I can, therefore I am.
To be a good loser is to learn how to win.
Quality is not an act, it is a habit.
If you can dream it, you can do it.
Begin to be now what you will be hereafter.
You never know what motivates you.
Either you run the day or the day runs you.
What you do today can improve all your tomorrows.
Go for it now. The future is promised to no one.
The secret of getting ahead is getting started.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.