You never know what motivates you.
Well done is better than well said.
If you've got a talent, protect it.
Quality is not an act, it is a habit.
Problems are not stop signs, they are guidelines.
Only the educated are free.
The wise does at once what the fool does at last.
Be kind whenever possible. It is always possible.
The secret of getting ahead is getting started.
The most effective way to do it, is to do it.
Beauty is the first test: there is no permanent place in the world for ugly mathematics.