Philosophy finds talkativeness a disease very difficult and hard to cure. For its remedy, conversation, requires hearers: but talkative people hear nobody, for they are ever prating. And the first evil this inability to keep silence produces is an inability to listen.

Knavery is the best defense against a knave.

This excerpt is presented as reproduced by Copernicus in the preface to De Revolutionibus: "Some think that the earth remains at rest. But Philolaus the Pythagorean believes that, like the sun and moon, it revolves around the fire in an oblique circle. Heraclides of Pontus and Ecphantus the Pythagorean make the earth move, not in a progressive motion, but like a wheel in rotation from west to east around its own center."

Painting is silent poetry.

For the rich men without scruple drew the estate into their own hands, excluding the rightful heirs from their succession; and all the wealth being centred upon the few, the generality were poor and miserable. Honourable pursuits, for which there was no longer leisure, were neglected; the state was filled with sordid business, and with hatred and envy of the rich.

What we achieve inwardly will change outer reality.

Themistocles replied that a man's discourse was like to a rich Persian carpet, the beautiful figures and patterns of which can only be shown by spreading and extending it out; when it is contracted and folded up, they are obscured and lost.