Strong adhering to the worldly life, excessive love to pleasures and lusts, changing according to tendencies, fancies and instincts besides the material and immaterial interests and pleasures all are considered as dangerous plagues that obstacle man’s way and behavior and prevent him from achieving the real repentance. So a repentant must purify himself from all these things and try to cure these diseases and plagues so that he can follow the way of repentance and turning to Allah the Almighty.
source : REPENTANCE THE CRADLE OF MERCY By Husayn Ansariyan