what we call cultural evolution is essentially a constant growing and widening of the human imagination. - Jacob Bronowski

we must always remember that the real content of evolution (biological as well as cultural) is the elaboration of new behaviour.

power is the by-product of understanding. So the Greeks said that Orpheus played the lyre with such sympathy that wild beasts were tamed by the hand on the strings. They did not suggest that he got this gift by setting out to be a lion tamer.

The whole structure of thought in the Middle Ages is one which we find hard to grasp today. It was an orderly structure, but the principles by which it was ordered seem to us now outlandish and meaningless.