The scientist finds his reward in what Henri Poincare calls the joy of comprehension, and not in the possibility of application to which any discovery may lead.

Raffiniert ist der Herr Gott, aber boshaft ist er nicht. God is subtle, but he is not malicious.

Bear in mind that the wonderful things you learn in your schools are the work of many generations. All this is put in your hands as your inheritance in order that you may receive it, honor it, add to it, and one day faithfully hand it on to your children.

The more cruel the wrong that men commit against an individual or a people, the deeper their hatred and contempt for their victim.

It takes a touch of genius - and a lot of courage to move in the opposite direction.

Anyone can repeat a technical explanation they read in a text-book or blog post.

To dwell on the things that depress or anger us does not help in overcoming them. One must knock them down alone.