Well done is better than well said.
Leap, and the net will appear.
The secret of getting ahead is getting started.
By failing to prepare, you are preparing to fail.
Who seeks shall find.
Problems are not stop signs, they are guidelines.
You never know what motivates you.
Only the educated are free.
Never complain and never explain.
Be gentle to all and stern with yourself.
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.