"There is no human but there is a jaw-latch in his head, in the hand of an angel. When he is humble, it is said to the angel, 'lift up his jaw-latch.' And when he is arrogant, it is said to the angel, 'put down his jaw-latch.'"
"Allah has placed enmity between Shayṭān and the angel, between reason and desires, and between the insistent self and the heart. He has tested His servant with this and gathered them together, providing each party with soldiers and supporters."
"O you who have believed, shall I guide you to a transaction that will save you from a painful punishment? Believe in Allah and strive in His cause... He will forgive your sins and admit you into gardens beneath which rivers flow. That is the great attainment."

"Sins and transgressions are weapons and supports with which a servant arms his enemies and assists them against himself. They fight with his own weapons, and he sides with them against himself. This is the height of ignorance."