"Look at where people assign blame and you never hear them saying, "It's my fault because I didn't know how to trade," or "It's my fault because I bet too much." It's always, "You know, my neighbor gave me a bad tip" or "My broker gave me a bad fill," or "I walked away, I was in the bathroom and the thing collapsed on me," or whatever. It's always this outside locus of control thing. It's never "I was wrong. I am responsible." It's always "them" and "they." None of it is reasonable thinking."
Trading to Win, by Ari Kiev, M.D.