He who wishes to see how the soul inhabits the body should look to see how that body uses its daily surroundings. If the dwelling is dirty and neglected, the 82 body will be kept by its soul in the same condition, dirty and neglected.

People of higher talent work, even if they seem to do nothing.

In the days of thy youth seek to obtain that which shall compensate the losses of thy old age.

The painter or draftsman ought to be solitary, in order that the well-being of the body not sap the vigor of the mind.

Those who condemn the supreme certainty of mathematics feed on confusion, and can never silence the contradictions of the sophistical sciences which lead to eternal quackery.

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.

O painter, take care lest the greed for gain prove a stronger incentive than renown in art, for to gain this renown is a 80 far greater thing than is the renown of riches.

True and great love springs out of great knowledge, and where you know little you can love but little or not at all.

Advertisers constantly invent cures to which there is no disease.

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.