So the story of man runs in a dreary circle, because he is not yet master of the earth that holds him.

Knowledge that does not generate achievement is a pale and bloodless thing, unworthy of mankind.

Every science begins as philosophy and ends as art; it arises in hypothesis and flows into achievement.

If our economy of freedom fails to distribute wealth as ably as it has created it, the road to dictatorship will be open to any man who can persuasively promise security to all.

Continue to express your dissent and your needs, but remember to remain civilized, for you will sorely miss civilization if it is sacrified in the turbulence of change.

Grow strong, my comrade … that you may stand Unshaken when I fall; that I may know The shattered fragments of my song will come At last to finer melody in you; That I may tell my heart that you begin Where passing I leave off, and fathom more.

In my youth I stressed freedom, and in my old age I stress order. I have made the great discovery that liberty is a product of order.