O sleepers! what a thing is slumber! Sleep resembles death. Ah, why then dost thou not work in such wise as that after death thou mayst retain a resemblance to perfect life, when, during life, thou art in sleep so like to the hapless dead?

A good painter has two main objects to paint, man and the intention of his soul.

He who never puts his trust in any man will never be deceived.

A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.

Oh! Speculators on things, boast not of knowing the things that nature ordinarily brings about; but rejoice if you know the end of those things which you yourself device.

Medicine is the restoration of discordant elements; sickness is the discord of the elements infused into the living body.

Who sows virtue ought to reap honour.