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.

When, in the present world, men behave well, that is no doubt sometimes because they are creatures of habit as well as, sometimes, because they are reasonable.

February... Now more than ever one must remind oneself that it is wasteful folly to wish that time would pass, or - as the puritanical old saying used to have it - to kill time until it kills you.

To have passed through life and never experienced solitude is to have never known oneself. To have never known oneself is to have never known anyone.

It is not ignorance but knowledge which is the mother of wonder.

In our hearts those of us who know anything worth knowing know that in March a new year begins, and if we plan any new leaves, it will be when the rest of Nature is planning them too.

Man is the only one in whom the instinct of life falters long enough to enable it to ask the question "Why?