We must learn not to take traditional morals too seriously. And it is just because even the least dogmatic of religions tends to associate itself with some kind of unalterable moral tradition, that there can be no truce between science and religion.

Reality is the cage of those who lack imagination.

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

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

Quantitative work shows clearly that natural selection is a reality, and that, among other things, it selects Mendelian genes, which are known to be distributed at random through wild populations, and to follow the laws of chance in their distribution to offspring. In other words, they are an agency producing variation of the kind which Darwin postulated as the raw material on which selection acts.

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

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