The theology of the Islamic scriptures informs most aspects of muslim life and culture. The Five Pillars of Islam is expressed in the Quran (Koran), which is a practical doctrine that encourages Muslims to pray 5 times a day, fast during Ramadan, pilgrimage to Mecca, declare 'There is no god but God, and Muhammad is his prophet' and pay money to the poor.With such a strong foundation in revelation and prophets of God, Islamic philosophy benefited in the eighth century a.d. by the translations of ancient Greek philosophy into Arabic. In the ninth century a.d. a school of translators and intellectuals, known as 'The House of Wisdom' was founded in Baghdad. It was here and largely through the translations of these scholars, that the writings of Plato, Aristotle and the Neoplatonists became known to the Arabs, and subsequently to the western world which led to the Renaissance. The influence of the ancient Greek philosophers upon the arabic philosophers / thinkers stimulated them to study and interpret the Quran / Koran from a rational foundation.
I think the history of Islamic religion is really interesting (even though I am not Muslim).