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.

Man is, perhaps, no more prone to war than he used to be and no more inclined to commit other evil deeds. But a given amount of ill will or folly will go further than it used to.

Only those within whose own consciousness the sun rise and set, the leaves burgeon and wither, can be said to be aware of what living is.

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

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.

Security depends not so much upon how much you have, as upon how much you can do without.

If only the fit survive and if the fitter they are the longer they survive, then Volvox must have demonstrated its superb fitness more conclusively than any higher animal ever has.