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

In science we must be interested in things, not in persons.

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something, and that this thing, at whatever cost, must be attained.

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

You cannot hope to build a better world without improving the individuals.

It is my earnest desire that some of you should carry on this scientific work and keep for your ambition the determination to make a permanent contribution to science.

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