If you're going through hell, keep going.
What you do today can improve all your tomorrows.
It's always too early to quit.
Who seeks shall find.
Know or listen to those who know.
I can, therefore I am.
The wise does at once what the fool does at last.
To be a good loser is to learn how to win.
Well done is better than well said.
Be gentle to all and stern with yourself.
Don't take too much comfort in the fact that you're successful today because tomorrow could bring failure. There's no surety in life.