It's not only what we have inherited from our father and mother that walks in us. It's all sorts of dead ideas, and lifeless old beliefs, and so forth. They have no vitality, but they cling to us all the same, and we can't get rid of them.

You see, there are some people that one loves, and others that perhaps one would rather be with.

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

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

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

The great secret of power is never to will to do more than you can accomplish.

If you doubt yourself, then indeed you stand on shaky ground.