"“If you do not find any sweetness and relaxation in your heart from a [good] deed, then you should suspect your heart. Verily, Allâh is grateful. That is, He must reward the doer of the deed for his deed in this world by a sweetness he finds in his heart, a stronger feeling of relaxation and a joy in his eyes. If the person does not find these things, it means that something has entered upon his deed [and made it not correct and purely for Allâh’s sake.” [Ibn Qayyim, Madârij, Vol. 2, P. 68]