When Aaron (not his real name) was 15, he began praying to Satan: “I felt like he and I had a partnership.” Aaron started to lie, steal, and manipulate his family and friends. He also experienced nightmares: “I woke up one morning and saw the devil at the end of the bed. He told me that I was going to pass my exams and then die.” Yet when he finished his exams, he lived. Aaron reflected, “It was clear to me that he was a liar.”

Hoping to meet girls, Aaron went to a Christian festival, where a man offered to…