Even if smog were a risk to human life, we must remember that life in nature, without technology, is wholesale death.

I've always thought that a feeling which changes never existed in the first place.

There is no such dichotomy as 'human rights' versus 'property rights.' No human rights can exist without property rights.

But Aristotle's philosophy was the intellect's Declaration of Independence.

Consider the reasons which make us certain that we are right, but not the fact that we are certain. If you are not convinced, ignore our certainty. Don't be tempted to substitute our judgment for your own.

Whoever, to whatever purpose or extent, initiates the use of force, is a killer acting on the premise of death in a manner wider than murder: the premise of destroying man's capacity to live.

In proportion to the mental energy he spent, the man who creates a new invention receives but a small percentage of his value in terms of material payment, no matter what fortune he makes, no matter what millions he earns. But the man who works as a janitor in the factory producing that invention, receives an enormous payment in proportion to the mental effort that his job requires of him. And the same is true of all men between, on all levels of ambition and ability.