There is no great invention, from fire to flying, which has not been hailed as an insult to some god.

Christianity is haunted by the theory of a God with a craving for bloody sacrifices.

Shelley and Keats were the last English poets who were at all up to date in their chemical knowledge.

It was a reaction from the old idea of "protoplasm", a name which was a mere repository of ignorance.

Science affects the average man and woman in two ways already. He or she benefits by its application driving a motor-car or omnibus instead of a horse-drawn vehicle, being treated for disease by a doctor or surgeon rather than a witch, and being killed with an automatic pistol or shell in place of a dagger or a battle-axe.

An attempt to study the evolution of living organisms without reference to cytology would be as futile as an account of stellar evolution which ignored spectroscopy.

It wasn't until I had performed by first autopsy that I realized that even the drabest human exteriors could contain the most beautiful viscera. After that, I would console myself for the plainness of my fellow bus-riders by dissecting them in my imagination.