If man had not been his own classifier, he would never have thought of founding a separate order for his own reception.

Freedom of thought is best promoted by the gradual illumination of men’s minds which follows from the advance of science.

Even people who aren’t geniuses can outthink the rest of mankind if they develop certain thinking habits.

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.

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

The main conclusion here arrived at ... is that man is descended from some less highly organized form.