A spirit, too, needs fuel. It can run dry.

Have you noticed that the imbecile always smiles? Man's first frown is the first touch of God on his forehead. The touch of thought.

If a drought strikes them, animals perish--man builds irrigation canals; if a flood strikes them, animals perish--man builds dams; if a carnivorous pack attacks them, animals perish--man writes the Constitution of the United States.

...only the pleasure which proceeds from a rational value judgement can be regarded as moral, pleasure, as such, is not a guide to action nor a standard of morality.

Just as man's physical existence was liberated when he grasped that 'nature, to be commanded, must be obeyed', so his consciousness will be liberated when grasps that nature, to be apprehended, must be obeyed - that the rules of cognition must be derived from the nature of existence and the nature, the identity, of his cognitive faculty.

It's the hardest thing in the world - to do what we want. And it takes the greatest kinds of courage.

If it's worth doing, it's worth overdoing.