self-fulfilling prophesies

I totally buy into the whole self-fulfilling prophesies. I believe that if someone is told something enough then they will start believing it. If someone is constantly being told that they are a failure then eventually they are going to just give up on life and believe they will fail at everything. On the other hand if someone is constantly told how great they are they will start to believe it and become very coincided. So yea I totally believe in the self-fulfilling prophesies.