Well done is better than well said.
Be gentle to all and stern with yourself.
Problems are not stop signs, they are guidelines.
Either you run the day or the day runs you.
Wherever you are - be all there.
The secret of getting ahead is getting started.
You never know what motivates you.
Without hard work, nothing grows but weeds.
Always desire to learn something useful.
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.