When Allah granted Prophet Yoosuf (`alayhis-Salaam) physical beauty it caused him to be locked up in the prison; but when Allah granted him knowledge (when he interpreted the dream of the king) it not only took him out of prison, but elevated his rank in society, clearly showing us the virtue of knowledge and that physical beauty does not mean anything.
Ibn Qayyim Al-JawziyyaTruly 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-JawziyyaIf a man's patience is stronger than his whims and desires, then he is like an angel, but if his whims and desires are stronger than his patience, then he is like a devil. If his desire for food, drink and sex is stronger than his patience, then he is no better than an animal.
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-JawziyyaThere is no joy for the one who does not bear sadness, there is no sweetness for the one who does not have patience, there is no delight for the one who does not suffer, and there is no relaxation for the one who does not endure fatigue.
Ibn Qayyim Al-Jawziyya