Technology made large populations possible; large populations now make technology indispensable.

Happiness is a kind of gratitude and vice versa.

Being the inventor of sex would seem to be a sufficient distinction for a creature just barely large enough to be seen by the naked eye.

When a man wantonly destroys one of the works of man we call him a vandal. When he destroys one of the works of god we call him a sportsman.

In the long run our boasted control of nature is a delusion.

Science has always promised two things not necessarily related; an increase first in our powers, second in our happiness or wisdom, and we have come to realize that it is the first and less important of the two promises which it has kept most abundantly.

Happiness is itself a kind of gratitude.