He consumed with thoughts of accountability without any awareness of forgiveness. That thinking helped plunge him into deep darkness. He could not stop thinking about all the terrible things he had done in the past. He concluded that God could not possibly love a person like him. Good people are strong.
Bad people are weak.
For the bad who are weak, it is hopeless. Though he probably does not know where he got that idea, I am confident it was formed by some church or religious group in his past. That perception of strength and weakness threatens to devour him. We must allow the New Testament to create our perceptions about strength and weakness. I am sure several people would be nominated, but I think two persons would be nominated more than anyone else.