There is nothing strange in the circle being the origin of any and every marvel.

We make war that we may live in peace.

If happiness is activity in accordance with excellence, it is reasonable that it should be in accordance with the highest excellence.

In making a speech one must study three points: first, the means of producing persuasion; second, the language; third the proper arrangement of the various parts of the speech.

There is more evidence to prove that saltness [of the sea] is due to the admixture of some substance, besides that which we have adduced. Make a vessel of wax and put it in the sea, fastening its mouth in such a way as to prevent any water getting in. Then the water that percolates through the wax sides of the vessel is sweet, the earthy stuff, the admixture of which makes the water salt, being separated off as it were by a filter.

...one Greek city state had a fundamental law: anyone proposing revisions to the constitution did so with a noose around his neck. If his proposal lost he was instantly hanged.

Happiness depends on ourselves.