The most important factor in survival is neither intelligence nor strength but adaptability.

I have rarely read anything which has interested me more, though I have not read as yet more than a quarter of the book proper. From quotations which I had seen, I had a high notion of Aristotle's merits, but I had not the most remote notion what a wonderful man he was. Linnaeus and Cuvier have been my two gods, though in very different ways, but they were mere schoolboys to old Aristotle.

We have happy days, remember good dinners.

And hail their queen, fair regent of the night.

We are optimists, until we are not.

It strikes me that all our knowledge about the structure of our Earth is very much like what an old hen would know of the hundred-acre field in a corner of which she is scratching.

We will now discuss in a little more detail the Struggle for Existence.