He’s just rambling. He knows he can’t live in sin and be a pastor so he is blaming everyone but himself.
Actually I can understand his 8th grade doubt. I’ve seen it affect people before. He had doubts. It’s not an unusual human trait. But to know you are fraudulently ministering to a flock and you yourself know you are lying to your parishioners you have stolen from them.
Of course his genitalia were responsible for his coming clean. If he were happy with his lot he would have continued to steal from his flock.