There is no captive in a worse state than the one who is captivated by his worst enemy (Shaytan) and there is no prison which is tighter than the prison of hawa (desire) and there is no bond/fetter more strong than the bond of desire. How, then, will a heart which is captivated, imprisoned and fettered travel unto Allah and the Home of the Hereafter?
Ibn Qayyim Al-JawziyyaRepel the thought, for if you don't, it becomes an idea. So repel the idea, for if you don't it will become a desire. So fight against that(desire), for if you don't, it will become a determination and a passion. And if you don't repel that, it will become an action. And if you don't replace it with its opposite, it will become a constant habit. So at that point, it will be difficult for you to change it.
Ibn Qayyim Al-JawziyyaBeware of every hour and how it passes, and only spend it in the best possible way, do not neglect yourself, but render it accustomed to the noblest and best of actions, and send to your grave that which will please you when you arrive to it.
Ibn Qayyim Al-JawziyyaSins have many side-effects. One of them is that they steal knowledge from you.
Ibn Qayyim Al-Jawziyya