D.N.A. sequences change by mutations, and the idea behind the molecular clock is that those changes occur at, more or less, a constant rate, over time.

Lice have been with us and evolving with us for as long as we have existed.

The loss of body hair is interesting to anthropologists, because it is a feature that distinguishes us from our nearest living relatives, chimpanzees. They have body hair, we don't.

Once she said the world was an astonishing animal: light was its spirit and noise was its mind. That it was composed to feed on honor, but did not.

Altering our distressing emotions is an uphill battle. When you experience undesirable emotional outburst, try to alter the thought behind.

Is devotion to others a cover for the hungers and the needs of the self, of which one is ashamed? I was always ashamed to take. So I gave. It was not virtue. It was a disguise.

When I was a kid, I never saw a puppet show. I never played with puppets or had any interest in them.

Voluntary service of others demands the best of which one is capable, and must take precedence over service of self.

Most things don't work like they are supposed to work.

There is no wider gulf in the universe than yawns between those on the hither and thither side of vital experience.

I have been laid up with intentional flu.

The novel should be understood as a structure built to accommodate the greatest possible amount of cool stuff.

No generation has a right to contract debts greater than can be paid off during the course of its own existence.