The Disease and The Cure الداء والدواء - عطاءات العلم

Al Daa wa al Dawaa by Ibn al Qayyim is a powerful work on the diseases of the heart and their cures. It discusses the harmful effects of sins, desires, and attachment to worldly temptations, while explaining how Tawbah, Dhikr, Dua, patience, and obedience to Allah bring healing and strengthen the heart.