Children who are treated as if they are uneducable almost invariably become uneducable.

One musn't overrate the culture of what used to be called "top people" before the wars. They had charming manners, but they were as ignorant as swans.

Gargoyles were the complement to saints; Leonardo's caricatures were complementary to his untiring search for ideal beauty. And gargoyles were the expression of all the passions, the animal forces, the Caliban gruntings and groanings which are left in human nature when the divine has been poured away. Leonardo was less concerned than his Gothic predecessors with the ethereal parts of our nature, and so his caricatures, in their expression of passionate energy, merge imperceptibly into the heroic.

The dark ghettos are social, political, educational and-above all-economic colonies. Their inhabitants are subject peoples, victims of the greed, cruelty, insensitivity, guilt, and fear of their masters.

The nude does not simply represent the body, but relates it, by analogy, to all structures that have become part of our imaginative experience.

A lot of people you think you know you don't know until you find out you don't know then it may be too late to know.

It is often said that Leonardo drew so well because he knew about things; it is truer to say that he knew about things because he drew so well.