My lectures are published and not published; they will be intelligible to those who heard them, and to none beside.

Some persons hold that, while it is proper for the lawgiver to encourage and exhort men to virtue on moral grounds, in the expectation that those who have had a virtuous moral upbringing will respond, yet he is bound to impose chastisement and penalties on the disobedient and ill-conditioned, and to banish the incorrigible out of the state altogether. For (they argue) although the virtuous man, who guides his life by moral ideals, will be obedient to reason, the base, whose desires are fixed on pleasure, must be chastised by pain, like a beast of burden.

Men are marked from the moment of birth to rule or be ruled.

Great and frequent reverses can crush and mar our bliss both by the pain they cause and by the hindrance they offer to many activities. Yet nevertheless even in adversity nobility shines through, when a man endures repeated and severe misfortune with patience, not owing to insensibility but from generosity and greatness of soul.

Knowing yourself is the beginning of all wisdom.

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

This world is inescapably linked to the motions of the worlds above. All power in this world is ruled by these options.