The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
L'argent est le nerf de la guerre.
No matter how good you get you can always get better, and that's the exciting part.
The best time to work on your marriage is before you have one.
Happiness is beneficial for the body, but it is grief that develops the powers of the mind.