How many emperors and how many princes have lived and died and no record of them remains, and they only sought to gain dominions and riches in order that their fame might be ever-lasting.

The part always has a tendency to reunite with its whole in order to escape from its imperfection.

Art is never finished, only abandoned.

The painter who is familiar with the nature of the sinews, muscles, and tendons, will know very well, in giving movement to a limb, how many and which sinews cause it; and which muscle, by swelling, causes the contraction of that sinew; and which sinews, expanded into the thinnest cartilage, surround and support the said muscle.

While I thought that I was learning how to live, I have been learning how to die.

The senses are of the earth, the reason stands apart from them in contemplation.