To be a good loser is to learn how to win.
Expect problems and eat them for breakfast.
Either you run the day or the day runs you.
The secret of getting ahead is getting started.
If you're going through hell, keep going.
Leap, and the net will appear.
You never know what motivates you.
Be gentle to all and stern with yourself.
Quality is not an act, it is a habit.
The dog that trots about finds a bone.
All the mathematical sciences are founded on relations between physical laws and laws of numbers, so that the aim of exact science is to reduce the problems of nature to the determination of quantities by operations with numbers.