You cannot hope to build a better world without improving the individuals. To that end each of us must work for our own improvement, and at the same time share a genaral responsibility for all humanity, our particular duty being to aid those to whom we think can be most useful.

Just remember you will find that one special love that you know is right but for some reason just doesn't last

Sometimes my courage fails me and I think I ought to stop working, live in the country and devote myself to gardening. But I am held by a thousand bonds, and I don't know when I shall be able to arrange things otherwise. Nor do I know whether, even by writing scientific books, I could live without the laboratory.

I am one of those who think like Nobel, that humanity will draw more good than evil from new discoveries.

Scientist believe in things, not in person

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

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