Sins have many side-effects. One of them is that they steal knowledge from you.
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-JawziyyaAs long as one is following the right way, one should never be concerned about the reproaches of those who like to find faults.
Ibn Qayyim Al-Jawziyya