Is seeing a radiant face saying, "You will enter Hellfire," while suffering from a mental illness, considered a good vision or one from Satan? And is the forced faith thereafter unrewarded? And can this vision be a means to steer clear of sins?

These are delusions and whispers caused by mental illness, so you must seek treatment and not pay attention to them. Your faith is a matter of choice, and you will be rewarded for it. If you commit a sin, hasten to sincere repentance, for "the one who repents from sin is like one who has no sin." We advise you to consult the counseling section on our website.