A Muslim believes in Allah (the Arabic name referring to God); that nothing other than Allah is worthy of worship, and that Muhammad is His final Prophet. Allah is considered unique, without equal. His existence is realizable but His essence and nature is beyond human comprehension. He was not born, has no children, and does not die. Islam is monotheistic – believing only in One God. Islamic belief in Allah - called Tawheed (absolute oneness) – is at the heart of the Islamic creed. Muslims also believe in particular articles of belief. This is called Iman (faith): to believe in Allah, His Angels, His Books, His Messengers, The Day of Judgement, that fate whether good or bad is from Allah.
Angels are beings from the realm of the 'unseen', 'created of light', taking different forms. Angels do not eat, drink or reproduce. They have no free will and worship Allah without faltering. Some of these angels are known by name, for example Jibreel (Gabriel) who brings divine revelations to the Prophets.
The books revealed to the Prophets include the Tawrah (Torah) to Musa (Moses), the Zabur (Psalms) to Dawud (David), the Injil (Gospel) to Isa (Jesus), and finally the Quran revealed to Muhammad (peace be upon them all). Muslims believe in them all, but only follow the last book, the Quran which is the final and most reliably transmitted revelation from Allah.
Belief in the Messengers of Allah is also an integral part of the Islamic faith. Muslims believe that all messengers were human beings chosen by Allah and given divine revelations from Allah. They were sent to humankind to teach (us) how to worship Allah’s will and obey His laws. Some of the messengers were Dawud (David), Nuh (Noah), Isa (Jesus) and Muhammad.
The Day of Judgement is when all humanity will be resurrected with new bodies to stand before Allah for His judgment on their eternal fate. They will be shown whatever good and whatever bad they did during their lives. Hence, Muslims believe all are accountable for every action done and proceed through life conscious of that. Allah will judge every mature person on Judgement Day and by His Wisdom and Justice some people will be sent to heaven and some will be sent to hell. Both heaven and hell are beyond our capacities to understand except by how they have been described in the Quran and by Allah’s prophets. Heaven is described as a paradise. Hell has many descriptions all associated with unimaginable torment.
Finally, Muslims believe that Allah has full knowledge and power over everything that happens and everything that will happen. Muslims believe that there is a reason for everything that happens and that occurrences are not merely by chance.