Every Christian church has tried to impose a code of morals of some kind for which it has claimed divine sanction. As these codes have always been opposed to those of the gospels a loophole has been left for moral progress such as hardly exists in other religions.

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

I will give up my belief in evolution if someone finds a fossil rabbit in the Precambrian.

I have come to the conclusion that my subjective account of my motivation is largely mythical on almost all occasions. I don't know why I do things.

The wise man regulates his conduct by the theories both of religion and science. But he regards these theories not as statements of ultimate fact but as art-forms.

So far from being an isolated phenomenon the late war is only an example of the disruptive result that we may constantly expect from the progress of science.

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