Hmmm. Don't agree with most of it and think it's a bit silly.

I do nice things - because I am selfish. When I do something nice, I get a happy hormone rush. Payback. When I do something nice, it is just for me.

However, I really can't agree with any of the theology in that, so I won't bother to "go deep". I don't believe in karma or reincarnation - I do "believe" my actions are rewarded and punished internally through hormones/guilt.