Humanity needs practical men, who get the most out of their work, and, without forgetting the general good, safeguard their own interests. But humanity also needs dreamers, for whom the disinterested development of an enterprise is so captivating that it becomes impossible for them to devote their care to their own material profit.

Nothing in this world is to be feared... only understood.

All my life through, the new sights of Nature made me rejoice like a child.

My husband and I were so closely united by our affection and our common work that we passed nearly all of our time together.

More and more, I feel the need for a house and a garden.

First principle: never to let one's self be beaten down by persons or by events.

I am among those who think that science has great beauty.