Surah Al Baqarah 02:208: O you who believe, enter Islam completely, and do not follow the footsteps of Satan. Surely, he is an open enemy for you (End Translation) -------Tafseer Tafheem ul Quran : God demands that man should submit, without reservation, the whole of his being to His will. Man's outlook, intellectual pursuits, behaviour, interaction with other people and modes of endeavour should all be completely subordinate to Islam. God does not accept the splitting up of human life into separate compartments, some governed by the teachings of Islam and others exempt.