Sane judgment abhors nothing so much as a picture perpetrated with no technical knowledge, although with plenty of care and diligence.

If a man devotes himself to art, much evil is avoided that happens otherwise if one is idle.

No single man can be taken as a model for a perfect figure, for no man lives on earth who is endowed with the whole of beauty.

And since geometry is the right foundation of all painting, I have decided to teach its rudiments and principles to all youngsters eager for art. . .

Geometry is the foundation of all painting.

What beauty is, I know not, though it adheres to many things.

Help us to recognize your voice, help us not to be allured by the madness of the world, so that we may never fall away from you, O Lord Jesus Christ.