What You Think?

I've started to learn more about energy and how everything's a vibration, how we create our reality, that the mind is everything, as in what we say and put out in the world, what we think, actually starts to become a reality. So when it says what we think, we become. If we think we're a loser, if we're bad at math, if we're bad at these different things, we'll probably become bad at those things. Might become that loser that we're saying we are.