The Reality of Faith (Al-Iman)
Allah the Almighty sent the Archangel Gabriel (Jibril) to ask the Prophet ﷺ essential questions as a means of teaching the Ummah. Among these was the pivotal question: "What is Iman (Faith)?" To understand our religion, we must take a focused look at the meaning of faith and the scholarly nuances surrounding it.
In essence, Iman is the heart’s internal conviction (Tasdiq) in everything brought by our Master Muhammad ﷺ that is "necessarily known to be part of the religion" (Ma’lum min al-din bi al-darurah). These are matters so fundamental that they require no complex deduction, such as the obligation of Prayer, Fasting, Zakat, and Hajj, or the prohibition of usury, adultery, gambling, injustice, and alcohol.
Iman is the very first obligation upon a morally and legally responsible person (Mukallaf). Its foundation is the heart’s affirmation, free from doubt or hesitation, coupled with "submission and compliance" (Idh’an) to the truth of the Prophet’s message.
The primary evidence that faith is an act of the heart is Allah’s statement: "Those—He has written faith in their hearts." [Al-Mujadilah/22]. This verse, among many other textual proofs, demonstrates that the true location of faith is the heart.
One might ask: What about the famous definition by some scholars that faith is "speech by the tongue, conviction by the heart, and action by the limbs"?
The answer is that this is a description of the perfection of faith (Kamal al-Iman), not its minimum requirement for validity (Asl al-Iman). While the heart’s conviction is the root, the declaration of the Two Testimonies (Shahadatayn) and the performance of good deeds are the fruits that complete and perfect it.
Pronouncing the Shahadah is a condition for applying worldly legal rulings to a person (such as marriage, inheritance, and burial in Muslim cemeteries). It is not technically a "part" or "pillar" of the internal reality of faith itself.
The Mute or Incapable: If someone truly believes in their heart but is physically unable to speak (due to a condition like being mute), they are saved in the sight of Allah.
The Silent Believer: If a person recognizes the truth and submits in their heart but passes away before anyone asks them to testify—provided they weren't stubborn or refusing—they are a believer before Allah, though they were not treated as Muslims in this life because they never voiced their belief.
The Stubborn Refuser: If someone is asked to testify and refuses out of arrogance or spite (without a valid excuse like fear), they are considered a disbeliever, as their refusal indicates a lack of internal submission.
Born Muslims: A person born to Muslim parents who believes in their heart but neglects to verbally recite the Shahadah is a "sinful Muslim" because they neglected a secondary obligation, but they remain within the fold of Islam.
As Imam Ibn Hajar al-Haytami explained in Al-Tuhfah: "Faith, according to the theologians, has two perspectives: salvation in the Hereafter—which depends solely on internal conviction—and the application of worldly rulings—which depends on the verbal testimony."
Good deeds are not a pillar of faith's existence, but they are the cause of its increase and strength. Faith is dynamic; it increases with obedience and decreases with sin, but the "root" (the conviction in the heart) does not vanish simply due to a sin. Allah says: "The believers are only those who, when Allah is mentioned, their hearts become fearful, and when His verses are recited to them, it increases them in faith..." [Al-Anfal/2].
Based on this understanding, a person who falls short in their religious duties (like someone who misses prayer out of laziness) is not a disbeliever as long as they do not deny that the prayer is obligatory. Similarly, someone who commits a sin (like drinking alcohol out of weakness) is not a disbeliever as long as they do not claim that the sin is "permissible" (Halal). They remain a believer, though their faith is deficient and they are in need of repentance.
