Nothing before had ever made me thoroughly realise, though I had read various scientific books, that science consists in grouping facts so that general laws or conclusions may be drawn from them.

In my simplicity, I remember wondering why every gentleman did not become an ornithologist.

The instruction at Edinburgh was altogether by lectures, and these were intolerably dull, with the exception of those on chemistry.

I would give absolutely nothing for the theory of Natural Selection, if it requires miraculous additions at any one stage of descent.

May we not suspect that the vague but very real fears of children, which are quite independent of experience, are the inherited effects of real dangers and abject superstitions during ancient savage times?

The man that created the theory of evolution by natural selection was thrown out by his Dad because he wanted him to be a doctor. GAWD, parents haven't changed much.

It is not the biggest, the brightest or the best that will survive, but those who adapt the quickest.