The future is not a gift-it is an achievement.

Everyday is an oportunity to make a new happy ending.

Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

Nothing happens til something moves.

O, Youth: Do you know that yours is not the first generation to yearn for a life full of beauty and freedom?

To act intelligently in human affairs is only possible if an attempt is made to understand the thoughts, motives, and apprehension of one's opponent so fully that one can see the world through their eyes.

The emotional state that leads to achievements resembles that of a worshiper or the lover.