You are what you think.

"Man becomes great when he thinks great thoughts."

"When your thinking is brilliant, you will be brilliant, but if your thinking is not brilliant you will not be brilliant, no matter how brilliant you may think you are."

"When you think that you are beautiful, you are liable to think that you are more beautiful than others, and such a thought is not a beautiful thought. To recognize or criticise ugliness and inferiority in others is to create the inferior and the ugly in yourself, and what you create in yourself will sooner or later be expressed through your mind and personality."

"What you admire in others will develop in yourself. Therefore, to love the ordinary in any one is to become ordinary, while to love the noble and the lofty in all minds is to grow into the likeness of that which is noble and lofty."

"What we love in others we not only awaken in others, but we develop those very things more or less in ourselves."

~ Christian D. Larson, in Your Forces and How to Use Them.