There is so much falsehood both at home and at school. At home one must not speak, and at school we have to stand and tell lies to the children.

Each bird must sing with his own throat.

What ought a man be? Well, my short answer is 'himself'.

But a scientific man must live in a little bit of style.

I don't imagine you will dispute the fact that at present the stupid people are in an absolutely overwhelming majority all the world over.

The devil is compromise.

It is inexcusable for scientists to torture animals; let them make their experiments on journalists and politicians.