Though it is true we are the highest and smartest animals, ospreys have eyes we have calculated to be sixty times more powerful and sophisticated than our own and that blindness, often caused by microscopic parasites that are themselves miracles of ingenuity, is one of the oldest and most tragic disorders known to man. And why award the superior eye (or in the case of cat or bat, also the ear) to the inferior species.

Religion has run out of justifications. Thanks to the telescope and the microscope, it no longer offers an explanation of anything important. Where once it used to able, by its total command of a worldview, to prevent the emergence of rivals, it can now only impede and retard-or try to turn back-the measureable advances that we have made.

I retain what's interesting to me, but I don't have a lot of strategic depth.

The beauty of science hugely outranks the charms of superstition.

And the pleasures and rewards of the intellect are inseparable from angst, uncertainty, conflict and even despair.

If religious instruction were not allowed until the child had attained the age of reason, we would be living in a quite different world.

Beware the irrational, however seductive. Shun the 'transcendent' and all who invite you to subordinate or annihilate yourself. Distrust compassion; prefer dignity for yourself and others. Don't be afraid to be thought arrogant or selfish. Picture all experts as if they were mammals. Never be a spectator of unfairness or stupidity. Seek out argument and disputation for their own sake; the grave will supply plenty of time for silence. Suspect your own motives, and all excuses. Do not live for others any more than you would expect others to live for you.