...the self-satisfied dogmatism with which mankind at each period of its history cherishes the delusion of the finality of existing modes of knowledge.

Philosophy asks the simple question: What is it all about?

A man of science doesn't discover in order to know, he wants to know in order to discover.

War can protect; it cannot create.

Imagination is not to be divorced from the facts. It is a way of illuminating the facts.

In formal logic, a contradiction is the signal of defeat, but in the evolution of real knowledge it marks the first step in progress toward a victory.

When you're average, you're just as close to the bottom as you are the top.