Make your faces so that they do not all have the same expression, as one sees with most painters, but give them different expression, according to age, complexion, and good or bad character.

Advertisers constantly invent cures to which there is no disease.

If you are alone you belong entirely to yourself. If you are accompanied by even one companion you belong only half to yourself or even less in proportion to the thoughtlessness of his conduct and if you have more than one companion you will fall more deeply into the same plight.

The memory of benefits is a frail defence against ingratitude.

We may call painting the grandchild of nature.

All our knowledge originates in opinion.

A day will come in which men will look upon an animal's murder the same way they look today upon a man's murder.