Beauty perishes in life, but is immortal in art.

He who thinks little errs much.

Everything comes from everything, and everything is made out of everything, and everything returns into everything.

O painter skilled in anatomy, beware lest the undue prominence of the bones, sinews and muscles cause you to become a wooden painter from the desire to make your nude figures reveal all.

The lover is moved by the beloved object as the senses are by sensual objects; and they unite and become one and the same thing. The work is the first thing born of this union; if the thing loved is base the lover becomes base.

Nature is constrained by the cause of her laws which dwell inborn in her. Variant: Nature is constrained by the order of her own law which lives and works within her.

There is no result in nature without a cause; understand the cause and you will have no need of the experiment.