My works are the issue of simple and plain experience which is the true mistress.

He who despises painting has no love for the philosophy in nature.

The good painter must paint two things: a person and the essence of his soul.

Abbreviators do harm to knowledge and to love.

The limiting surface of one thing is the beginning of another.

The divisions of Perspective are 3, as used in drawing; of these, the first includes the diminution in size of opaque objects; the second treats of the diminution and loss of outline in such opaque objects; the third, of the diminution and loss of color at long distances.

The lover is moved by the beloved object as the senses are by sensual objects; and they unite and become one and the same thing. The work is the first thing born of this union; if the thing loved is base the lover becomes base.

The painter strives and competes with nature.

Just as food eaten without appetite is a tedious nourishment, so does study without zeal damage the memory by not assimilating what it absorbs.

Given the cause nature produces the effect in the briefest manner that it can employ.