“Once I asked Imam abu al-Hassan al-Rida (a.s.), about capability. The Imam said, ‘A servant (of Allah) has the capability if four things exist. That he is free and on his own, that he is physically well and of sound limbs and that for him there is reason and means from Allah.’ I asked, ‘May Allah keep my soul in the service for your cause, please explain it to me.’ The Imam said, ‘Being free and on one’s own, physically well and of sound limbs means that one is willing to commit adultery but does not find a female party and then he finds her. He may now protect his soul and stay away from sin just as Joseph (peace be upon him) did or allow his desire to act and commit adultery and in this case he is called an adulterer. He has not obeyed Allah in coercion and disobeyed Him with defeat.’”