Not to have known - as most men have not - either the mountain or the desert is not to have known one's self. Not to have known one's self is to have known no one.

Happiness is itself a kind of gratitude.

The famous balance of nature is the most extraordinary of all cybernetic systems. Left to itself, it is always self-regulated.

If people destroy something replaceable made by mankind, they are called vandals; if they destroy something irreplaceable made by God, they are called developers.

A tragic writer does not have to believe in God, but he must believe in man.

In history as it comes to be written, there is usually some Spirit of the Age which historians can define, but the shape of things is seldom so clear to those who live them. To most thoughtful men it has generally seemed that theirs was an Age of Confusion.

Though many have tried, no one has ever yet explained away the decisive fact that science, which can do so much, cannot decide what it ought to do.