This document discusses the key reasons Muslims believe in Islam. It begins by defining belief and Islam. The main reasons provided are:
1) Belief in one God (Allah), angels, prophets, the Quran, the last day of judgment, and rights for all things.
2) Specific beliefs are outlined, including belief in prophets who were sent to guide humanity, angels created from light, and the Quran being revealed by Allah to Muhammad.
3) The last day of judgment involves final assessment, resurrection and reward or punishment for all humanity.