The nude gains its enduring value from the fact that it reconciles several contrary states. It takes the most sensual and immediately interesting obj… - Kenneth Clark

Seen by itself the David's body might be some unusually taut and vivid work of antiquity; it is only when we come to the head that we are aware of a spiritual force that the ancient world never knew. I suppose that this quality, which I may call heroic, is not a part of most people's idea of civilisation. It involves a contempt for convenience and a sacrifice of all those pleasures that contribute to what we call civilised life. It is the enemy of happiness. And yet we recognise that to despise material obstacles, and even to defy the blind forces of fate, is man's supreme achievement; and since, in the end, civilisation depends on man's extending his powers of mind and spirit to the utmost, we must reckon the emergence of Michelangelo as one of the great events in the history of western man.

Fine colour implies a unified relationship, in which each part is subordinate to the whole, and the transitions between them are felt to be as precious and beautiful as the colours themselves. In fact, the colours themselves must be continuously modified and broken as part of the transition. Ruskin said in his Elements of Drawing, "Give me some mud off a city crossing, some ochre out of a gravel-pit, a little whitening, and some coal dust, and I will paint you a luminous picture, if you give me time to gradate my mud, and subdue my dust." In many works by the greatest colourists — Rembrandt and Watteau are examples — there are very few identifiable colours.

How did he do it? First of all, with the help of an outstanding teacher and librarian named Alcuin of York, he collected books and had them copied. People don’t always realise that only three or four antique manuscripts of the Latin authors are still in existence: our whole knowledge of ancient literature is due to the collecting and copying that began under Charlemagne, and almost any classical text that survived until the eighth century has survived till today.