You can drop a mouse down a thousand-yard mine shaft and, on arriving at the bottom, it gets a slight shock and walks away. A rat would probably be killed, though it can fall safely from the eleventh story of a building, a man is broken, a horse splashes.

To the biologist the problem of socialism appears largely as a problem of size.

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."

There are 400,000 species of beetles on this planet, but only 8,000 species of mammals.

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

Now, if the cooperation of some thousands of millions of cells in our brain can produce our consciousness, a true singularity, the idea becomes vastly more plausible that the cooperation of humanity, or some sections of it, may determine what Comte calls a Great Being.

I will jump into the river to save two brothers or eight cousins.