At some time in the ninth century one could have looked down the Seine and seen the prow of a Viking ship coming up the river. Looked at today in the British Museum it is a powerful work of art; but to the mother of a family trying to settle down in her little hut, it would have seemed less agreeable – as menacing to her civilisation as the periscope of a nuclear submarine.

The moral and intellectual failure of Marxism has left us with no alternative to heroic materialism, and that isn't enough.

Early artists considered the human body, that forked radish, that defenseless starfish, a poor vehicle for the expression of energy, compared to the muscle-rippling bull and the streamlined antelope. Once more it was the Greeks, by their idealization of man, who turned the human body into an incarnation of energy, to us the most satisfying of all, for although it can never attain the uninhibited physical flow of the animal, its movements concern us more closely. Through art we can relive them in our own bodies, and achieve thereby that enhanced vitality which all thinkers on art, from Goethe to Berenson, have recognized as one of the chief sources of aesthetic pleasure.

At this point I reveal myself in my true colours, as a stick-in-the-mud. I hold a number of beliefs that have been repudiated by the liveliest intellects of our time. I believe that order is better than chaos, creation better than destruction. I prefer gentleness to violence, forgiveness to vendetta. On the whole I think that knowledge is preferable to ignorance, and I am sure that human sympathy is more valuable than ideology. I believe that in spite of the recent triumphs of science, men haven't changed much in the last two thousand years; and in consequence we must still try to learn from history. History is ourselves. I also hold one or two beliefs that are more difficult to put shortly. For example, I believe in courtesy, the ritual by which we avoid hurting other people's feelings by satisfying our own egos. And I think we should remember that we are part of a great whole. All living things are our brothers and sisters. Above all, I believe in the God-given genius of certain individuals, and I value a society that makes their existence possible.

People sometimes tell me that they prefer barbarism to civilisation. I doubt if they have given it a long enough trial. Like the people of Alexandria, they are bored by civilisation; but all the evidence suggests that the boredom of barbarism is infinitely greater.

It means that at certain epochs man has felt conscious of something about himself – body and spirit – which was outside the day-to-day struggle for existence and the night-to-night struggle with fear; and he has felt the need to develop these qualities of thought and feeling so that they might approach as nearly as possible to an ideal of perfection – reason, justice, physical beauty, all of them in equilibrium. He has managed to satisfy this need in various ways – through myths, through dance and song, through systems of philosophy and through the order that he has imposed on the visible world. The children of his imagination are also the expressions of an ideal.

Ruskin's much-derided moral theory of art was part of an attempt to show that this human activity, which we value so highly, engaged the whole of human personality. His insistence on the sanctity of nature was part of an attempt to develop Goethe's intuition that form cannot be put together in the mind by an additive process, but is to be deduced from the laws of growth in living organisms, and their resistance to the elements.

We are so much accustomed to the humanitarian outlook that we forget how little it counted in earlier ages of civilisation. Ask any decent person in England or America what he thinks matters most in human conduct: five to one his answer will be "kindness." It's not a word that would have crossed the lips of any of the earlier heroes of this series. If you had asked St. Francis what mattered in life, he would, we know, have answered "chastity, obedience and poverty"; if you had asked Dante or Michelangelo, they might have answered "disdain of baseness and injustice"; if you had asked Goethe, he would have said "to live in the whole and the beautiful." But kindness, never. Our ancestors didn't use the word, and they did not greatly value the quality — except perhaps insofar as they valued compassion.

Bright-minded young people think poorly of existing institutions and want to abolish them. Well, one doesn't need to be young to dislike institutions. But the dreary fact remains that, even in the darkest ages, it was institutions that made society work, and if civilisation is to survive society must somehow be made to work. At this point I reveal myself in my true colours, as a stick-in-the-mud. I hold a number of beliefs that have been repudiated by the liveliest intellects of our time. I believe that order is better than chaos, creation better than destruction. I prefer gentleness to violence, forgiveness to vendetta. I believe that in spite of the recent triumphs of science, men haven't changed much in the last two thousand years; and in consequence we must still try to learn from history. History is ourselves.

It remains true that Michelangelo's intensely personal use of the nude greatly altered its character. He changed it from a means of embodying ideas to a means of expressing emotions; he transformed it from the world of living to the world of becoming. And he projected his world of the imagination with such unequaled artistic power that its shadow fell on every male nude in art for three hundred and fifty years. Painters either imitated his heroic poses and proportions or they reacted against them self-consciously and sought a new repertoire of attitudes in the art of fifth-century Greece. In the nineteenth century the ghost of Michelangelo was still posing the models in art schools.

Lives devoted to Beauty seldom end well.