Geometry is the foundation of all painting.
Love and delight are better teachers than compulsion.
Sane judgment abhors nothing so much as a picture perpetrated with no technical knowledge, although with plenty of care and diligence.
Why has God given me such magnificent talent? It is a curse as well as a great blessing.
Simplicity is the greatest adornment of art.
If a man devotes himself to art, much evil is avoided that happens otherwise if one is idle.