Converting to Islam requires only understanding of the knowledge that Allah is the one true God and that Muhammad is the Messenger of Allah and saying a sentence to that effect. The actual sentence that one who wishes to convert should say is, “La ilaha illa Allah, Muhammad rasoolu Allah.”
The sentence for converting, or reverting as Muslims prefer to call it, is called the Shahada. Upon saying this sentence, however, it is expected that the new convert become very dedicated to learning about the tenets of the Muslim faith and practicing them. There are six articles of belief in Islam and five pillars of faith. The six articles of belief are that Allah is the one true God, Muhammad is his prophet, the holy books are true, the angels sent by God are real, a final judgment is coming and there are no other gods worthy of worship. The pillars of faith are practices that help Muslims be faithful. They involve prayer, fasting, being charitable, declaring one's faith and making a pilgrimage to Mecca, which is the holy city of Islam. Although Islam varies is some aspects of its beliefs from Christianity and Judaism, it is considered to be one of three Judeo-Christian religions, because it subscribes to the theory of one God.