He turns not back who is bound to a star.
Make yourself a master of perspective, then acquire perfect knowledge of the proportions of men and other animals.
He who cannot establish dominion over himself will have no dominion over others.
The painter strives and competes with nature.
Learning is the only thing that never disappoints us.
Why are the bones of great fishes, and oysters and corals and various other shells and sea-snails, found on the high tops of mountains that border the sea, in the same way in which they are found in the depths of the sea?