What you do today can improve all your tomorrows.
By failing to prepare, you are preparing to fail.
It's always too early to quit.
Never complain and never explain.
Be gentle to all and stern with yourself.
The wise does at once what the fool does at last.
To be a good loser is to learn how to win.
Quality is not an act, it is a habit.
Either you run the day or the day runs you.
I can, therefore I am.
Beauty is the first test: there is no permanent place in the world for ugly mathematics.