The 6 Pillars of Iman
While the Pillars of Islam govern outward actions, the Pillars of Iman (Faith) govern the inward beliefs required of a Muslim.
Belief in Allah
التوحيد (Tawhid)
The core of Islam is strict monotheism. A Muslim must believe that there is only one God, Allah. He has no partners, no parents, and no children. He is the Creator, the Sustainer, and the Master of the universe. He possesses perfect names and attributes.
Belief in His Angels
الملائكة (Al-Mala'ikah)
Muslims believe in the existence of angels, unseen beings created from light. They do not possess free will and exist solely to obey and worship Allah. Examples include Jibril (Gabriel) who brought revelation, and Mika'il (Michael).
Belief in His Books
الكتب (Al-Kutub)
Muslims believe in all original divine scriptures sent by Allah to various prophets for guidance. This includes the Tawrat (Torah) given to Moses, the Zabur (Psalms) to David, the Injeel (Gospel) to Jesus, and the final preservation of guidance: the Quran given to Muhammad.
Belief in His Messengers
الرسل (Ar-Rusul)
Muslims believe that Allah chose specific human beings to deliver His message to humanity. A Muslim must believe in all of them without distinction—from Adam, Noah, Abraham, Moses, and Jesus, ending with the final Prophet, Muhammad (peace be upon them all).
Belief in the Last Day
اليوم الآخر (Al-Yawm Al-Akhir)
Belief in the Day of Judgment is central to accountability in Islam. It is the belief that this world will end, and all humanity will be resurrected by Allah to be judged for their earthly deeds, resulting in admission to Jannah (Paradise) or Jahannam (Hell).
Belief in Divine Decree
القدر (Al-Qadar)
Muslims believe that Allah has supreme knowledge and power over everything in the universe. Everything that happens—good or perceived bad—occurs by His Will and according to His pre-ordained decree, while humans simultaneously possess free will to choose their actions.