Answer: Belief in Allah Almighty
It is to believe that Allah is the One Who created you and provided for you, and that Allah alone is the Owner and the Disposer of affairs.
It is also to believe that Allah is the only deity worthy of worship,
and that He is the Magnificent, the Great, and the Perfect to Whom all praise is due and Who owns the beautiful names and the sublime attributes. He has no rivals and nothing is like Him.
Belief in the Angels
Angels are creatures that Allah created from light. They were created to worship Allah and fully obey His commands.
Gabriel (peace be upon him), who was assigned to bring down the revelation to the prophets, is one of the angels.
Belief in the Books
These are the books that Allah sent down to His messengers. Examples are:
- The Qur’an that was revealed to Muhammad (may Allah’s peace and blessings be upon him)
- The Gospel that was revealed to ‘Isa (Jesus) (peace be upon him)
- The Torah that was revealed to Mūsa (Moses) (peace be upon him)
- The Psalms that were revealed to Dāwūd (David) (peace be upon him)
The Scriptures of Ibrāhim (Abraham) and Moses
Belief in the Messengers
They are the messengers whom Allah Almighty sent to His servants to teach them, bring them the glad tidings of good and Paradise, and warn them against evil and Hellfire.
The best among them are the Messengers of Firm Resolve, who are:
Nūh (Noah) (peace be upon him)
Ibrāhim (Abraham) (peace be upon him)
Mūsa (Moses) (peace be upon him)
Īsa (Jesus) (peace be upon him)
Muhammad (may Allah’s peace and blessings be upon him)
Belief in the Last Day
It refers to what comes after death in the grave, on the Day of Judgment, and on the Day of Resurrection and Reckoning after which the dwellers of Paradise settle in their abodes and the dwellers of Hellfire settle in theirs.
Belief in destiny with its good and bad aspects
It is to believe that Allah knows everything that happens in the universe, which He had previously written in the Preserved Tablet and had willed to create and bring to existence.
Allah Almighty says: {Indeed, We have created everything according to a determined measure.} [Surat al-Qamar: 49]
It has four levels:
First: Knowledge of Allah Almighty: This includes Allah’s prior knowledge of everything, before and after it happens.
Allah says: {Indeed, Allah has the knowledge of the Hour. He sends down the rain and knows what is in the wombs. No soul knows what it will do tomorrow, nor does any soul know in which land it will die. Indeed, Allah is All-Knowing, All-Aware.} {Surat Luqmān: 34]
Second: Allah had written this in the Preserved Tablet; so, whatever happened and whatever will still happen are written with Allah in a record.
Allah says: {He alone has the keys of the unseen; no one knows them except Him. He knows what is in the land and sea. Not a leaf falls without His knowledge, nor a grain in the darkness of the earth, nor anything moist or dry, but is [written] in a Clear Record.} [Surat al-An‘ām: 59]
Third: Everything happens by the will of Allah, i.e., nothing happens by Him or by His creatures, except by His will.
Allah says: {For those among you who wish to take the straight path. But you cannot wish except by the Will of Allah, the Lord of the worlds.} [Surat at-Takwīr: 28-29]
Fourth: Believing that all creatures are created by Allah. He created them and created their qualities, movements, and everything related to them.
Allah says: {When it is Allah Who created you and all what you do?} [Surat as-Sāffāt: 96]