Patience is that the heart does not feel anger towards that which is destined and that the mouth does not complain.
Ibn Qayyim Al-JawziyyaEvery gulp of air that goes out in a cause other than the cause of Allah will turn to sorrow and regret on the Day of Judgement.
Ibn Qayyim Al-JawziyyaThe sinner does not feel any remorse over his sins, that is because his heart is already dead
Ibn Qayyim Al-Jawziyya