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What do Muslims actually believe? This section addresses the foundational beliefs of Islam: the core articles of faith and the sources Muslims draw on, what Islam teaches about the afterlife, divine judgment, and human free will, and how Muslims understand angels, Satan, and the unseen world. These questions provide a starting point for understanding the worldview that shapes Muslim practice and ethics, including where Muslims agree and where interpretations differ.
Beliefs, Practices, and Sources of Islam
Islam is the name of a religion, as Christianity and Judaism are names of religions. The Arabic word “Islam” is based on the root “s–l–m,” which means peace or surrender to God or accepting one’s circumstances. Taken together, these senses yield the meaning “the state of peace through following God’s guidance.”
Islamic is an adjective that modifies a non-human noun, for example, “Islamic art,” “Islamic architecture,” “Islamic beliefs,” etc. This term should not be used to refer to a person.
A follower of Islam is called a Muslim, or “one who is in a state of peace by following God’s guidance.”
While the term Arab has been used in the past to refer to members of a Semitic ethnic group from the Arabian Peninsula, today the word “Arab” refers to people from Arabic-speaking countries, most of which are in the Middle East and North Africa. Importantly, the terms are not interchangeable: most Muslims are not Arabs (only about one in five Muslims worldwide is Arab), and many Arabs are not Muslims.
The term Arabian was historically used to describe an inhabitant of the Arabian Peninsula. Today “Arabian” is used as an adjective to describe a non-human noun (e.g., Arabian coffee and horses); it should not be used to refer to people.
Allah is simply the Arabic word for God. Arabic-speaking Christians and Jews also use the word Allah when referring to God. Muslims do not believe that Allah is a separate or uniquely Muslim deity; rather, they believe in the one God worshipped by Abraham, Moses, Jesus, and the other biblical prophets. In fact, Jesus likely referred to God as Alaha in Aramaic and Elohim is one of the names of God used in the Hebrew Bible, which come from the same Semitic root as the Arabic word for God, Allah.
The central belief of Islam is the oneness of God, known in Arabic as tawhid. Muslims believe that God is the creator and sustainer of the universe, is all-knowing and all-powerful, and is compassionate and merciful. The Quran describes God through many names and attributes, traditionally summarized as the “99 Names of God,” including the Compassionate, the Merciful, the Loving, the Forgiving, the Just, and the Creator.
Islam’s primary message, as understood by the overwhelming majority of Muslims, is a continuation of the Abrahamic monotheistic tradition: belief in the one God also worshipped by Jews and Christians. Islam has three major dimensions: beliefs, ritual practices, and the effort to improve one’s character and actions. There are six major beliefs in Islam and five central practices that are referred to as the Five Pillars.
The third dimension, which is the objective of the beliefs and practices, focuses on the cultivation of excellent moral character to better oneself and the world. It teaches a set of values that promote life, liberty, equality, and justice. Some of these values include:
- Respect for the earth and all creatures
- Care and compassion for those less fortunate
- The importance of seeking knowledge
- Honesty and truthfulness in word and deed
- Striving continuously to improve oneself and the world
The six major beliefs in Islam, as understood by the majority of Sunni Muslims, are:
- Belief in God (worshipped by prophet Abraham)
- Belief in angels
- Belief in God’s prophets and messengers
- Belief in God’s revelations in the form of holy scriptures given to the messengers
- Belief in an afterlife that follows the Day of Judgment during which people will be held accountable for their actions and compensated accordingly in the afterlife
- Belief in God’s divine will and knowledge of what happens in the world
Muslims practice their faith in many different ways, but the major practices for both Sunni and Shi‘i Muslims are known as the Five Pillars. Each pillar combines both spiritual and physical dimensions and serves as a foundation for daily living, moral discipline, and devotion to God. Together, they provide a holistic framework for a life rooted in faith, purpose, and community. The pillars include the following:
- Shahadah– Testimony of Faith
A Muslim’s religious journey begins with the shahadah, the declaration of faith: “There is no god but God, and Muhammad is a messenger of God.” This statement is not just a verbal affirmation; it is a spiritual and existential commitment. By accepting it, Muslims embrace belief in the same God worshipped by Abraham, Moses, Jesus, and Muhammad, recognizing all prophets as part of a single divine message. The spiritual dimension of the shahadah is expressed through dhikr, the remembrance of God through repeated prayers, Quranic recitation, and devotional litanies (known as wird). The physical dimension lies in how one lives this commitment: by surrendering to God’s will while actively engaging with life’s challenges. This idea of “surrender” doesn’t mean being passive; rather, it reflects a deep trust in divine wisdom; approaching life with calm and purpose and without anxiety, while actively doing one’s best with whatever circumstances arise.
- Salah– Daily Prayers
Next is salah, the five canonical daily prayers performed from dawn to night, each serving as a spiritual reset. Muslims face the Ka‘bah in Mecca, believed to have been first built by Adam with the help of the angel Gabriel and later rebuilt by Abraham and his son Ishmael as a monotheistic sanctuary. Each taking 5-10 minutes to perform, salah involves physical movements, standing, bowing, and prostration, symbolizing humility, focus, and spiritual grounding. It’s a structured act of devotion and discipline that reconnects the believer to God throughout the day, providing clarity, stability, and peace.
- Zakah– Dues to the Community
Zakah is a form of social and spiritual purification. It requires Muslims to give from their wealth, usually 2.5% of saved income, to support the poor and those in need. However, zakah is not limited to financial giving. Even a smile, a kind word, or an act of generosity is considered a form of giving back to the community. The principle behind zakah is that all blessings are a trust from God, and we are responsible for sharing what we have to help build a more just and compassionate society.
- Sawm– Fasting During Ramadan
During the month of Ramadan, Muslims fast from dawn to sunset for 29 or 30 days. This act commemorates the revelation of the Quran and is meant to cultivate taqwa, mindfulness of God, self-awareness, and ethical conduct with the hope that these virtues become lasting habits over the course of the month. Muslims seek to enhance their spirituality through self-restraint, reflection, and recitation of the Qur’an, often aiming to complete it during the month. It is a deeply introspective time of purification, gratitude, and renewal.
- Hajj– The Pilgrimage to Mecca
Finally comes the Hajj, a once-in-a-lifetime obligation for Muslims who are physically and financially able. It represents the ultimate act of devotion, a rededication of the self to God through a powerful set of symbolic rites, performed annually during the 12th Islamic month of Dhul-Hijjah.
The primary sources of knowledge about Islam are the Quran, which Muslims believe is the divinely revealed word of God, and the Sunnah, which refers to the example or precedent of the Prophet Muhammad (i.e., what he said, did, approved, disapproved, caused, ordered, or allowed to happen). Much of what is known about the Sunnah is from the collection of sayings or reports known as Hadith, or prophetic traditions. The Hadith are reports of words spoken by the Prophet Muhammad or describe his actions or actions that his companions attributed to him. Hadith also elaborate on and provide context to the Quran.
Though both Sunnis and Shi‘a revere and respect the descendants of the Prophet Muhammad, many Shi‘a consider the rulings of the Twelve Imams a primary source with a status similar to that of the Quran and Sunnah. Other sources may exist for different Muslim sects.
In addition to these primary sources, Muslims have also traditionally relied on two further sources: scholarly consensus, the agreement of knowledgeable scholars on a particular issue, and analogical reasoning, the application of principles or laws derived from the Quran and Sunnah to similar situations not explicitly addressed by them. The lived experience of Islam, which naturally varies widely not only in different cultures but also between different individuals, also impacts and determines a Muslim’s understanding and practice of Islam.
Nothing at the hands of other people. We believe that acts of worship are done for the sake of God and that God alone judges each person, weighing intentions, actions, and circumstances. Religious observance is a matter between the individual and God, not something for others to police or punish; Islam has no clergy with such authority and no institution comparable to excommunication in the mainstream tradition.
In practice, Muslims, like Jews, Christians, and members of every faith, span a wide spectrum of observance, from the scrupulous to the occasional, and mosques are accustomed to welcoming people wherever they are; many Muslims who rarely pray still fast in Ramadan, and many return to practice at different seasons of life. Scholars distinguish between neglecting a practice, which is a private shortcoming, and rejecting its validity, which is a theological matter, but even there, judgment belongs to God. The Quranic principle that “there is no compulsion in religion” applies within the Muslim community as well as outside it.
Sufism, often described as the spiritual or mystical dimension of Islam, focuses on developing a closer relationship with God and cultivating qualities such as love, humility, generosity, patience, and sincerity. The term Sufism or tasawwuf in Arabic encompasses a wide variety of teachings and practices that have developed throughout Islamic history.
Sufis generally emphasize purification of the heart and the remembrance of God, known as dhikr, which may include prayer, meditation, recitation of God’s names, and other devotional practices. Historically, many Sufis joined spiritual orders led by teachers who guided students in developing their religious and spiritual lives.
Sufism is not a separate sect of Islam. Most Sufis have historically been Sunni or Shi‘i Muslims who follow the same foundational beliefs and practices as other Muslims while placing particular emphasis on spiritual and moral development. Sufi scholars, poets, and teachers, including Rumi and Ibn ‘Arabi, have profoundly influenced Islamic and even Western thought, literature, art, and culture.
Caring for people in need is a central Islamic obligation. The Quran repeatedly calls upon Muslims to assist the poor, orphans, widows, travelers, and other vulnerable people and condemns those who accumulate wealth while neglecting those in need.
One of the Five Pillars of Islam is zakah, a required charitable contribution generally calculated as 2.5% of certain accumulated wealth above a minimum threshold. Muslims are also encouraged to give voluntary charity, known as sadaqah, which can include money, food, assistance, or other acts of generosity. Islamic teachings also emphasize fair business dealings, care for workers, honesty, and opposition to exploitation.
These obligations reflect a broader Islamic understanding of social justice: wealth is a blessing but also a responsibility, and individuals have obligations toward their communities. Muslims therefore understand helping people in need not simply as an act of generosity but as part of their religious duty to promote justice, compassion, and human dignity.
Afterlife, Divine Judgment, and Free Will
Islam describes not only who judges but how, and two themes run through everything the Quran and the Prophet said about it: transparency and mercy.
The criteria are a person’s faith and deeds together, weighed with full knowledge of things no human court can see. Among the most famous prophetic sayings, “actions are judged by their intentions,” places the heart at the center of the accounting, and the Quran repeatedly states that no soul is held responsible beyond its capacity, so each person is judged against what they were given: their knowledge, abilities, opportunities, and circumstances. Two people who performed the same act, or failed the same test, may stand very differently before God.
The Quran’s imagery of the Day of Judgment makes the same point about transparency. Each person receives the complete record of their life and is told: “Read your record; you are sufficient today as your own accountant” (17:14); the judged person themselves sees the justice of the judgment. Deeds are weighed in a balance; nothing is hidden, nothing arbitrary, and no one bears another’s burden.
Yet the accounting is deliberately tilted toward mercy. The Quran states that a good deed is rewarded at least tenfold while a bad deed is counted only once (6:160); an intended good deed is recorded even if never performed, while an intended sin abandoned is recorded as a good deed; and sincere repentance erases what came before. The Prophet taught that no one enters Paradise by deeds alone, but by God’s mercy; righteousness is the path, mercy the gate.
One category is treated with special strictness: wrongs against other people. God may freely forgive offenses against Himself, but the tradition teaches that what we owe each other must be made right. The Prophet described the truly bankrupt person as one who arrives with prayer and fasting to their name, yet had insulted, struck, and cheated others, and whose good deeds are therefore handed over to their victims until justice is done. Judgment, in Islam, takes human beings’ claims on one another as seriously as God’s own.
All of this is why Muslims are forbidden to pronounce judgment on anyone’s destiny, including their own: the full reckoning belongs to the One the Quran calls the Judge and the Just, who is also, and first and foremost, the Compassionate and the Merciful.
Muslims believe that judgment belongs to God alone, and the tradition discourages Muslims from pronouncing judgment on the eternal destiny of any individual, believer or otherwise. What the Quran does affirm is that God is absolutely just and boundlessly merciful (a well-known prophetic saying describes God as more merciful to His creatures than a mother to her child), and that God judges each person by what they were given: their capacities, circumstances, knowledge, and the sincerity of their striving. The Quran states that no soul is burdened beyond what it can bear, and that even an atom’s weight of good is seen and counted.
On this basis, Muslim scholars, past and present, have held that people are not accountable for not believing when the message never reached them or reached them only in a distorted form a reasonable person might not find convincing, a category some contemporary scholars understand broadly in a world where many people’s honest reflection leads them elsewhere.
The Quran’s condemnations are directed at arrogant rejection of truth and at injustice, not at sincere doubt honestly held. Islam values faith profoundly, but where any particular person stands before God is not something Islam authorizes anyone to declare. Similar questions about the fate of good people outside the faith are debated within Christianity and Judaism as well, and, as in those traditions, believers ultimately entrust the answer to the justice and mercy of God.
This is among the oldest questions human beings have asked, and not only in religion: philosophers and scientists who don’t believe in God debate the same puzzle today in the language of determinism, neuroscience, and physics. Muslim scholars debated it intensely for centuries, some early schools stressed human freedom, others divine decree, and the majority of theological traditions settled on positions holding both.
The heart of the classical response is that knowledge is not compulsion. God’s knowing what a person will freely choose does not cause the choice, any more than a teacher’s accurate prediction of a student’s decision makes the decision for them, and the analogy actually understates the point, because Muslims understand God’s knowledge as timeless: God does not “fore-know” our choices from some earlier moment, waiting to see them play out; He encompasses all moments at once. From within time, we genuinely deliberate and choose; the reality of that choosing is precisely what God knows. The Quran is emphatic on the side of the question that matters morally: it rejects fatalism as an excuse, quoting and refuting those who said, “if God had willed, we would not have sinned,” and insists that “no soul bears the burden of another” and that each person will find their own actions recorded.
As for why God does not simply place people in their destinations: the tradition’s answer is that judgment rests on what people actually do, not on what God knows they would do, so that on the Day of Judgment the evidence is each person’s own lived record, and no one can protest that they were condemned for deeds never committed. The Quran says God tests people “so that whoever perished might perish upon clear evidence, and whoever lived might live upon clear evidence” (8:42). There is also a deeper point: a person is not separable from their choices. The self that could inhabit Paradise is formed by a lifetime of freely choosing patience, honesty, and mercy; to “skip” the life would be to skip the person.
Practically, Islamic teaching directs believers to hold the two truths in different directions: freedom governs how we look forward; we are fully responsible for what we choose next, while trust in God’s decree governs how we look back, bringing consolation in hardship and humility in success, never an excuse for wrongdoing. And Muslims concede what every tradition, religious or secular, must: the full reconciliation of freedom and foreknowledge lies beyond human sight. Islam asks believers to affirm both because each protects something essential, God’s sovereignty, and the human responsibility without which neither justice nor love would mean anything.
This is the hardest question any faith in an all-powerful and all-good God must face. The Quran itself records the angels questioning God’s purposes and prophets crying out in anguish. Job, whom the Quran honors, pleads “affliction has touched me” (21:83), so the question is not treated as impiety but as part of the human condition.
Several teachings, taken together, shape how Muslims hold it. Much of the world’s worst suffering, including that of children, is inflicted by human beings; the freedom that makes love, generosity, and courage possible also makes cruelty possible, and God’s response to such suffering includes His command that we stop it; justice and mercy are duties He assigns to us. For hardship that is no one’s fault, the Quran speaks of life as a trial to be met with patience (sabr), for which great reward is promised; but this framing describes those who endure and those who respond, not the innocent themselves. About them, the tradition says something different and stronger: children who die are received directly into Paradise, without judgment, and prophetic sayings comfort bereaved parents with the promise that their child will meet them there. The afterlife, in Islam, is where God’s justice completes what this world leaves broken; no injustice unredressed, no innocent suffering forgotten, not an atom’s weight.
Islam also gives grief its full dignity. The Prophet Muhammad wept openly at the death of his own infant son, saying, “the eyes shed tears and the heart grieves, but we say only what pleases our Lord.” Sorrow, and even protest, are not failures of faith. And the Quran’s story of Moses and Khidr (18:60–82), in which events that appear senseless carry meanings hidden from even a prophet, teaches humility about what we can see, not as an explanation, but as a reason to trust that our sight is not the whole of reality.
In the end, Islam directs believers less toward explaining suffering than toward relieving it: feeding the hungry, healing the sick, defending the oppressed, comforting the grieving. No answer erases the pain of an innocent child’s suffering, and Muslims do not claim one does; faith means carrying both the question and the trust that the Judge of all the earth is also the most Merciful of the merciful.
Yes, love is central in Islam’s vision of God, and not only through the related ideas of compassion and mercy. Among God’s names in the Quran is al-Wadud, “the Most Loving” (11:90, 85:14), and the Quran describes the mutual bond between God and His servants in exactly those terms: “He loves them and they love Him” (5:54). Verse after verse names those whom God loves, the doers of good, the just, the patient, those who turn back to Him, and a famous divine saying describes God drawing near to whoever approaches Him: “whoever comes to Me walking, I come to him at speed.”
Mercy, the attribute invoked most often, is itself warmer than the English word suggests. The Arabic rahma comes from the same root as rahim, the womb, so the “Compassionate, Merciful” God named at the head of nearly every chapter of the Quran, al-Rahman, al-Rahim, carries connotations of tender, nurturing, encompassing care, and the Prophet Muhammad said that God is more merciful to His creatures than a mother to her child, and that His mercy prevails over His wrath. This universal mercy embraces all of creation unconditionally: God sustains, provides for, and answers even those who deny Him. The Quran’s statements that God “does not love” the arrogant or the unjust refer to something further, God’s special intimacy and approval, which the tradition understands not as love withdrawn but as love awaiting a person’s turning; the Quran promises that God “loves those who constantly return to Him” (2:222), however often they fall.
Muslim spirituality has long placed this divine love at its very center. The early mystic Rabi‘a al-‘Adawiyya prayed to worship God neither from fear of hell nor desire for paradise but for God’s own sake, and poets of divine love such as Rumi, today among the most widely read poets in America, drew their entire vision from the Quran and the Prophet’s example. So, this is genuine common ground among the Abrahamic faiths: each frames divine love in its own way, but a Muslim, a Christian, and a Jew who say that God is loving, and that He is closer to us than we imagine, “nearer than the jugular vein,” as the Quran puts it (50:16), are speaking from a shared inheritance.
Angels, Satan, and the Unseen
Angels are mentioned throughout the Quran and Hadith (prophetic sayings) as beings created from light who by their nature obey God without fail and carry out assigned duties. The two most prominent angels named are Gabriel (Jibril), the angel of revelation, the same Gabriel who appears in Jewish and Christian scripture, including the Annunciation to Mary, and Michael (Mikha’il), charged with rain and the earth’s plant life. The tradition also speaks of recording angels who accompany each person, and of angels who will question the soul after death.
A few points distinguish the Islamic vision from common Western imagery. Angels in Islam are not depicted with gender, are never worshipped or petitioned independently of God, and humans do not become angels after death, a frequent misconception. Nor does Islam have “fallen angels”: angels are understood as incapable of disobedience, which is why Satan, who disobeyed, is classified as a jinn rather than an angel (see the question on Satan). Belief in angels is one of Islam’s six major beliefs, reflecting the broader Quranic teaching that reality includes more than what is material and measurable.
Satan (Shaytan in Arabic, also called Iblis) belongs to a third category of created beings alongside humans and angels: the jinn, made from fire as humans were made from clay and angels from light. The Quran teaches that jinn, like humans, have free will, some are good and submit to God, but that Iblis, in arrogant refusal of God’s command, became the tempter of humankind. In this, Islam resembles traditional Christian theology, with one structural difference: because angels in Islam cannot disobey God, Satan is not a fallen angel but a rebellious jinn.
Two further points are worth noting. First, Islam is emphatically not dualistic: Satan is a creature, not a rival power to God, and his only weapon is suggestion; the Quran has him admit on Judgment Day, “I had no authority over you except that I called you, and you responded” (14:22). Temptation whispers; it cannot compel; human beings remain responsible for their choices. Second, the practical teaching is undramatic: Muslims are taught to seek refuge in God from harmful promptings and move on, not to attribute their failings to demonic power or to fear it. Evil, in the Quran’s telling, is real but parasitic and ultimately powerless against a heart that turns to God.