The greatest geniuses sometimes accomplish more when they work less.

Experiment is the sole interpreter of the artifices of Nature.

The merit of painting lies in the exactness of reproduction. Painting is a science and all sciences are based on mathematics. No human inquiry can be a science unless it pursues its path through mathematical exposition and demonstration.

No human investigation can be called real science if it cannot be demonstrated mathematically.

Shadow is the diminution alike of light and of darkness, and stands between darkness and light.

Every action done by nature is done in the shortest way.

Oysters open completely when the moon is full; and when the crab sees one it throws a piece of stone or seaweed into it and the oyster cannot close again so that it serves the crab for meat. Such is the fate of him who opens his mouth too much and thereby puts himself at the mercy of the listener.