Never complain and never explain.
To be a good loser is to learn how to win.
If you can dream it, you can do it.
What you do today can improve all your tomorrows.
Go for it now. The future is promised to no one.
If you think you can do it, you can.
Well done is better than well said.
If you've got a talent, protect it.
Do not weep do not wax indignant. Understand.
Always desire to learn something useful.
One of the things that ultimately led me to leave mathematics and go into political science was thinking I could prevent nuclear war.