Islam is the religion of the Koran, which is the holy book of the Islamic faith. It is believed to be the word of God, revealed to the Prophet Muhammad over a period of 23 years. Islam is based on the belief in one God, Allah, and the teachings of the Koran. The five pillars of Islam are faith, prayer, charity, fasting, and pilgrimage. Muslims believe that following these pillars will bring them closer to God and lead to a life of peace and harmony.