That is absolutely 100% true. I have been burned by own anger so many times. You'd think a person would learn!
I am having a tough time with this. The two angry people that is messing with my life seem to be immune to any sort of pain. I don't think they are human, and definitely not Artificial Intelligence, since they are both dumb as a brick. So if I throw a hot coal back, I am the only one who gets burned. :-(