Delusions with the bible?

ok, lets say a certain pre-christian starts to cry for god, maybe he has read the bible a little, but not enough and is naive about the whole belief system. lets just say he crys out so much for god, and this certain person has a delusion about the bible, lets just say he has a delusion about being an angel, or a messenger of god, ok. now, lets say that this person has a mental breakdown and has been made very ill from this delusion, and this person starts sinning so heavily because of the pain of this mental condition, to a point of desolation, so is that it? he is rejected by god because of a delusion and he was not strong enough and full of fear to go to god and pray to get his head sorted out? i know of many story's like this one. can any christians give me a clear answer to this topic.