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 hum… - Kenneth Clark

Evidently one cannot look for long at the Last Supper without ceasing to study it as a composition, and beginning to speak of it as a drama. It is the most literary of all great pictures, one of the few of which the effect may largely be conveyed — can even be enhanced — by description.

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.

In time of war all countries behave equally badly, because the power of action is handed over to stupid and obstinate men.