In a cat's eye, all things belong to cats.

Poetry, mythology, and religion represent the world as man would like to have it, while science represents the world as he gradually comes to discover it.

Custom has furnished the only basis which ethics have ever had.

The impulse to mar and to destroy is as ancient and almost as nearly universal as the impulse to create. The one is an easier way than the other of demonstrating power.

We have not merely escaped from something but into something... We have joined the greatest of all communities, which is not that of man alone but of everything which shares with us the great adventure of being alive.

The human mind can appreciate the One only by seeing it first in the Many.

Those whose conscience demands that they defy authority in some ways that involve great consequences must be willing to accept some penalty.