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."

If you declare that you are naturally designed for such a diet, then first kill for yourself what you want to eat. Do it, however, only through your own resources, unaided by cleaver or cudgel or any kind of ax

When a man's struggle begins within oneself, the man is worth something.

For there is no virtue, the honour and credit for which procures a man more odium from the elite than that of justice; and this, because more than any other, it acquires a man power and authority among the common people. For they only honour the valiant and admire the wise, while in addition they also love just men, and put entire trust and confidence in them.

What sort of tree is there which will not, if neglected, grow crooked and unfruitful; what but Will, if rightly ordered, prove productive and bring its fruit to maturity? What strength of body is there which will not lose its vigor and fall to decay by laziness, nice usage, and debauchery?

There is no perfecter endowment in man than political virtue.

Apothegms are the most infallible mirror to represent a man truly what he is.