We tend to focus on the object and call it reality. We don't notice how our mind intervenes in our perception.

I am the greatest, I said that even before I knew I was.

You cannot control what happens to you, but you can control your attitude toward what happens to you, and in that, you will be mastering change rather than allowing it to master you.

He remarked that thinking often spoils everything and that evil usually begins with our thoughts.

What consumes your mind controls your life.

As you think, so shall you become.

The spirit of the individual is determined by his dominating thought habits.

A conditioned mind is never a free mind.

Seriously, if you always put limits on what you can do, physical or anything else; it'll spread over into the rest of your life. It'll spread into your work, into your morality, into your entire being... There are NO limits. There are plateus, but you must not stay there, you must go beyond them. If it kills you, it kills you. A man must constantly exceed his level.

God help thee old man, thy thoughts have created a creature in thee; and he whose intense thinking thus makes him a Prometheus; a vulture feeds upon that heart for ever; that vulture the very creature he creates.

You are today where your thoughts have brought you; you will be tomorrow where your thoughts take you.

You cannot perform in a manner inconsistent with the way you see yourself.