Lamentation is the only musician that always, like a screech-owl, alights and sits on the roof of any angry man.

Those who aim at great deeds must also suffer greatly.

It does not follow, that because a particular work of art succeeds in charming us, its creator also deserves our admiration.

Forgetfulness transforms every occurrence into a non-occurrence.

Talkativeness has another plague attached to it, even curiosity; for praters wish to hear much that they may have much to say.

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

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."