Truly in the heart there is a void that can not be removed except with the company of Allah. And in it there is a sadness that can not be removed except with the happiness of knowing Allah and being true to Him. And in it there is an emptiness that can not be filled except with love for Him and by turning to Him and always remembering Him. And if a person were given all of the world and what is in it, it would not fill this emptiness.
Ibn Qayyim Al-JawziyyaAnd to have spent the night sleeping and awoken regretful, is better than to have spent the night standing (in prayer) and awaken impressed with oneself!
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-JawziyyaEverything that is loved, if it is not loved for His sake then this love is nothing but distress and punishment. Every action that is not performed for His sake then it is wasted and severed. Every heart that does not reach Him is wretched; veiled from achieving its success and happiness.
Ibn Qayyim Al-Jawziyya