Ibn al-Qayyim gives a long discussion to the person who keeps sinning while relying on Allah's mercy. He distinguishes good expectation of Allah, which drives a person to act, from delusion, which invites idleness and immersion in sin (A086-1). He lists forms of this self-deception — misplacing reliance on Allah's generosity (A041-4, on Q 82:6), or claiming that a servant has no choice over his sins (A038-7) — and names as the most deluded of all the one deceived by this world over the next (A079-2).
Written for The Cure and checked against the Arabic — not Ibn al-Qayyim’s words. Each claim rests on A086-1, A041-4, A038-7, A079-2.