A fairly bright boy is far more intelligent and far better company than the average adult.

The world shall perish not for lack of wonders, but for lack of wonder

The idea of protoplasm, which was really a name for our ignorance, [is] only a little less misleading than the expression "Vital force".

I think, however, that so long as our present economic and national systems continue, scientific research has little to fear.

Capitalism, though it may not always give the scientific worker a living wage, will always protect him, as being one of the geese which produce golden eggs for its table.

I have tried to show why I believe that the biologist is the most romantic figure on earth at the present day. At first sight he seems to be just a poor little scrubby underpaid man, groping blindly amid the mazes of the ultra-microscopic, engaging in bitter and lifelong quarrels over the nephridia of flatworms, waking perhaps one morning to find that someone whose name he has never heard has demolished by a few crucial experiments the work which he had hoped would render him immortal.

A time will however come (as I believe) when physiology will invade and destroy mathematical physics, as the latter has destroyed geometry.