Try to acquire the weird practice of savoring your mistakes, delighting in uncovering the strange quirks that led you astray. Then, when you have sucked out all the goodness to be gained from having made them, you can cheerfully forget them and go on to the next big opportunity.

The problem is that no ethical system has ever achieved consensus. Ethical systems are completely unlike mathematics or science. This is a source of concern.

To put it bluntly but fairly, anyone today who doubts that the variety of life on this planet was produced by a process of evolution is simply ignorant — inexcusably ignorant, in a world where three out of four people have learned to read and write.

Darwin's idea of natural selection makes people uncomfortable because it reverses the direction of tradition.

The only answer to the endless chains of why, why, why is that the alternatives died

If I know better than you know what I am up to, it is only because I spend more time with myself than you do.

There is a time for politeness and there is a time when you are obliged to be rude.