I believe in this to a certain extent. Ive seen negative people that are always down on life and bad things continue to happen to them. Whereas, positive people seem to have and endless supply of good luck. Its the same with rap music, listening to negative music 24/7 rubs off on you and you start to think in a negative way. Ive been in situations where something good has happened, and ill be on a natural high from it and then there is a chain of positive events. I think its important to let bad things bounce off of you and not to dwell on them. I dont know about this being a "natural law" though, i think its more of a mental thing with the individual person...