It is not easy to imagine how little interested a scientist usually is in the work of any other, with the possible exception of the teacher who backs him or the student who honors him.

It takes a very deep-rooted opinion to survive unexpressed.

Literature: proclaiming in front of everyone what one is careful to conceal from one's immediate circle

What scientist would not long to go on living, if only to see how the little truths he has brought to light will grow up?

Greatness, in order to gain recognition, must all too often consent to ape greatness.

I think I am one of those who can manage not to take on a completely different appearance under their own glance.

Whether man is disposed to yield to nature or to oppose her, he cannot do without a correct understanding of her language