It's always too early to quit.

To be a good loser is to learn how to win.

If you've got a talent, protect it.

Quality is not an act, it is a habit.

Do not weep do not wax indignant. Understand.

I can, therefore I am.

The wise does at once what the fool does at last.

To know oneself, one should assert oneself.

The dog that trots about finds a bone.