Nature, in her blind thirst for life has filled every possible cranny of the rotting earth with some sort of fantastic creature.

The rare moment is not the moment when there is something worth looking at, but the moment when we are capable of seeing.

We must not judge the society of the future by considering whether or not we should like to live in it; the question is whether those who have grown up in it will be happier than those who have grown up in our society or those of the past.

Whenever man forgets that man is an animal, the result is always to make him less humane.

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.

It is not a sentimental, but a grimly literal fact that unless we share this terrestrial globe with creatures other than ourselves, we shall not be able to live on it for long.

The cockroach and the bird were both here long before we were. Both could.