I bought and read SEAL Team Six: Memoirs of an Elite Navy SEAL Sniper. In it, the author says that all snipers need to have a really strong faith, philosophy, or something like that to guide them so that they don't lose control of themselves and get intoxicated by the power. When you have someone in your scope, you really can feel like God, the decision to kill or let live is yours. He says that's why it was so easy for someone like the Washington sniper to get carried away and go on a killing spree. If you don't have something strong in you to guide you and keep you under control, you'll go wild, in his opinion.