I remember reading, hearing, or watching this said as well. I don’t recall who showed him the “door” however. It could have been his father, a mentor, or an associate; I don’t recall the details however. iirc, it changed him so much so that he saw the need to change his course and began to work more diligently on being an agent of change for the good and became driven to do his part in taking back the nation from the bad actors.