Things do not happen. Things are made to happen.
Do not weep do not wax indignant. Understand.
To be a good loser is to learn how to win.
Be gentle to all and stern with yourself.
By failing to prepare, you are preparing to fail.
If you've got a talent, protect it.
If you're going through hell, keep going.
I can, therefore I am.
If you think you can do it, you can.
After a storm comes a calm.
Many who have had an opportunity of knowing any more about mathematics confuse it with arithmetic, and consider it an arid science. In reality, however, it is a science which requires a great amount of imagination.