Experience never misleads; what you are misled by is only your judgment, and this misleads you by anticipating results from experience of a kind that is not produced by your experiments.

I have solved what color is, however ; I still have no idea about what line is.

The art of procreation and the members employed therein are so repulsive, that if it were not for the beauty of the faces and the adornments of the actors and the pent-up impulse, nature would lose the human species.

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.

O Lord, thou givest us everything, at the price of an effort.

Truth was always but the daughter of time.

Even the richest soil, if left uncultivated will produce the rankest weeds.