"Purity is half of belief. 'Praise be to Allah' fills up the balance, and 'Glory be to Allah and praise be to Allah' fills up everything between the heavens and the earth. The prayer is a light. Sadaqa is a proof. Steadfastness is an illumination. The Qur'an is a proof for you or against you. Everybody goes out and trades with his own self, either setting it free or destroying it."