It's always good to marry your best friend.

I never see what has been done; I only see what remains to be done.

Life is not easy for any for us.

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.

I have no dress except the one I wear every day. If you are going to be kind enough to give me one, please let it be practical and dark so that I can put it on afterwards to go to the laboratory.

There are sadistic scientists who hurry to hunt down errors instead of establishing the truth.

We must not forget that when radium was discovered no one knew that it would prove useful in hospitals.