The natural desire of good men is knowledge.

Water is the driving force of all nature.

The worst evil which can befall the artist is that his work should appear good in his own eyes.

A single and distinct luminous body causes stronger relief in the objects than a diffused light; as may be seen by comparing one side of a landscape illuminated by the sun, and one overshadowed by clouds, and illuminated only by the diffused light of the atmosphere.

A well-spent day brings happy sleep.

Fame alone raises herself to Heaven, because virtuous things are in favour with God.

The painter who draws by practise and judgment of the eye without the use of reason is like the mirror which reproduces within itself all the objects which are set opposite to it without knowledge of the same.