If you've got a talent, protect it.
It's always too early to quit.
The wise does at once what the fool does at last.
The dog that trots about finds a bone.
Be kind whenever possible. It is always possible.
The most effective way to do it, is to do it.
To be a good loser is to learn how to win.
You never know what motivates you.
If you're going through hell, keep going.
To know oneself, one should assert oneself.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.