Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.

Movement will fail sooner than usefulness.

Learning acquired in youth arrests the evil of old age; and if you understand that old age has wisdom for its food, you will so conduct yourself in youth that your old age will not lack for nourishment.

The painter strives and competes with nature.

A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.

It's easier to resist at the beginning than at the end.

Painting is concerned with the ten things you can see: these are darkness and brightness, substance and color, form and place, remoteness and nearness, movement and rest.