For the mind does not require filling like a bottle, but rather, like wood, it only requires kindling to create in it an impulse to think independently and an ardent desire for the truth.

Barba non facit philosophum

He who owns a hundred sheep must fight with fifty wolves

Note that the eating of flesh is not only physically against nature, but it also makes us spiritually coarse and gross by reason of satiety and surfeit.

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."

He who busies himself in mean occupations, produces in the very pains he takes about things of little or no use, an evidence against himself of his negligence and indisposition to what is really good

But the Lacedaemonians, who make it their first principle of action to serve their country's interest, know not any thing to be just or unjust by any measure but that.