Be kind whenever possible. It is always possible.
To be a good loser is to learn how to win.
I can, therefore I am.
Know or listen to those who know.
Always desire to learn something useful.
The wise does at once what the fool does at last.
Either you run the day or the day runs you.
Who seeks shall find.
It's always too early to quit.
Leap, and the net will appear.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.