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.

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

The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.

Many will think they may reasonably blame me by alleging that my proofs are opposed to the authority of certain men held in the highest reverence by their inexperienced judgments; not considering that my works are the issue of pure and simple experience.

Lying on a feather mattress or quilt will not bring you renown.

If we make mistakes in our first compositions and do not know them, we may not amend them.

He who possesses most must be most afraid of loss.