He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.

To succeed, we must first believe that we can.

Motivation is the fuel necessary to keep the human engine running.

Me only have one ambition, y'know. I only have one thing I really like to see happen. I like to see mankind live together – black, white, Chinese, everyone – that's all.

Every great advance in science has issued from a new audacity of the imagination

Day by day, what you do is who you become.

What you are is what you have been. What you’ll be is what you do now.