Problems are not stop signs, they are guidelines.
The wise does at once what the fool does at last.
If you can dream it, you can do it.
Go for it now. The future is promised to no one.
Never complain and never explain.
To be a good loser is to learn how to win.
What you do today can improve all your tomorrows.
To know oneself, one should assert oneself.
Do not weep do not wax indignant. Understand.
Be thine own palace, or the world's thy jail.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.