Our individual life is brief, and perhaps the whole life of mankind will be brief if measured in astronomical scale

A process which led from the amoeba to man appeared to the philosophers to be obviously a progress though whether the amoeba would agree with this opinion is not known.

When the journey from means to end is not too long, the means themselves are enjoyed if the end is ardently desired.

As a lover of truth, the national propaganda of all the belligerent nations sickened me. As a lover of civilization, the return to barbarism appalled me.

Curious learning not only makes unpleasant things less unpleasant but also makes pleasant things more pleasant.

We love our habits more than our income, often more than our life.

For a good notation has a subtlety and suggestiveness which at times make it seem almost like a live teacher.