What do the Muslims believe?
taken from Understanding Islam and the Muslims by The Islamic Affairs Department, The Embassy of Saudi Arabia

Muslims believe in the One, Unique, Incomparable, Merciful God - the Sole Creator and Sustainer of the Universe; in the Angels created by Him; in the Prophets through whom His revelations were brought to humankind; in the Day of Judgment and in individual accountability for actions; in God's complete authority over destiny, be it good or bad; and in life after death. Muslims believe that God sent His messengers and prophets to all people and God's final message to humanity, a reconfirmation of the eternal message and a summing up of all that had gone before, was revealed to the Last Prophet Muhammad (peace be upon him) through the Archangel Gabriel.