Most of my advances were by mistake. You uncover what is when you get rid of what isn't.

Controlled time is our true wealth.

Dictators never invent their own opportunities.

When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong.

Our power is in our ability to decide.

Parents are usually more careful to bestow knowledge on their children rather than virtue, the art of speaking well rather than doing well; but their manners should be of the greatest concern.