The extreme socialists desire to run every nation as a single business concern.

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

Haldane was engaged in discussion with an eminent theologian. "What inference," asked the latter, "might one draw about the nature of God from a study of his works?" Haldane replied: "An inordinate fondness for beetles."

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.

Money can buy a fine dog but it is kindness that makes him wag his tail.

Teleology is like a mistress to a biologist: he cannot live without her but he's unwilling to be seen with her in public.

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.