He in whom the love of repose predominates will accept the first creed, the first philosophy, the first political party he meets — most likely his father's. He gets rest, commodity, and reputation; but he shuts the door of truth.

Man has gone out to explore other worlds and other civilizations without having explored his own labyrinth of dark passages and secret chambers, and without finding what lies behind doorways that he himself has sealed.

It is discouraging to try to penetrate a mind like yours. You ought to get it out and dance on it. That would take some of the rigidity out of it.

I myself am convinced that the theory of evolution, especially to the extent to which it has been applied, will be one of the greatest jokes in the history books of the future. Posterity will marvel that so very flimsy and dubious an hypothesis could be accepted with the incredible credulity it has.