My proof is personal experience with Cain.
Can you explain this more?
I do feel a little uncomfortable with it but yes I will.
I had put this on another site so I just copy and pasted it here.
A few years ago I was sitting in my parents living room when I got a call from an aunt requesting that my friend and I come to her apartment. So I called my friend and told him to come dressed in his sunday bests. When we got to the apartment my friend suggested we have a quick prayer, so we did. Then we went up stairs to her apartment. When we walked in it was like walking into a wall of hatred and evil. I felt extremely uncomfortable. As soon as I gained my composure, I looked around the room there was my aunt and cousin, and her Home Teachers. She explained that she felt an evil presence in her home so she was going to have a blessing put on the home and on her and her son.
When I knelt down my aunt passed me and I felt fine. Then when my cousin passed me I felt uncomfortable again I wasn't the only one my friend felt it too. The when it came time to bless the house we all bowed our heads and the Home Teachers began to bless the house. My friend opened his eyes at the end and he said that the room was full of heavenly hosts with their swords drawn. I was getting ready to leave when my aunt asked me to stay the night. She explained that even with the priesthood blessing on the apartment she would feel safer if I were to stay the night. Let me add this little thing in. I have had long nights before but I had never experianced this long of a night. I slept in my cousins room and on his bed. I retired early and during the night I had a evil spirit attack me, I witnessed the whole thing in a dream, despite the fact that I was a priest in the Aaronic priesthood at the time some how I was able to defeat him.
The next day I felt absolutly exhausted, I couldn't get the energy up to do nothing, that night the same evil spirit attacked me again. Knowing that I was drained from the first battle he had an upper hand, I was about to lose my very life when a light came down from the heavens and a man appeared, and told the spirit to leave this boy alone and to never bother me again, the look on the spirits face was one of fear of this Man. After he left the Man had put his down to help me up when I touched his hand I felt energy return to my spirit. I looked closer at the man, I recognized him. It was Jesus Christ himself. He gave me some advice that I can't remember for a good reason more than likely. When I woke up I felt completely rested both body and spirit. That day my friend from a couple of days ago came over and I told him of the experiance, he said do you want to know who it was that attacked you, I was curious. He said that it was Cain. From that day on I have thought over and over again the events that had taken place I still don't know why I would be the focus of such an attack from the first Son of Perdition and receive help from the Son of Man.