Be thine own palace, or the world's thy jail.
To be a good loser is to learn how to win.
After a storm comes a calm.
To know oneself, one should assert oneself.
Without hard work, nothing grows but weeds.
You never know what motivates you.
Either you run the day or the day runs you.
Leap, and the net will appear.
Never complain and never explain.
Go for it now. The future is promised to no one.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.