It's always too early to quit.
If you're going through hell, keep going.
To be a good loser is to learn how to win.
Always desire to learn something useful.
If you think you can do it, you can.
The dog that trots about finds a bone.
Well done is better than well said.
I can, therefore I am.
Expect problems and eat them for breakfast.
The most effective way to do it, is to do it.
Modern society, based as it is on the division of labor, can be preserved only under conditions of lasting peace.