Understand however that every man is worth just so much as the things are worth about which he busies himself.

If any man should conceive certain things as being really good, such as prudence, temperance, justice, fortitude, he would not after having first conceived these endure to listen to anything which should not be in harmony with what is really good.

My city and state are Rome. But as a human being? The world. So for me, "good" can only mean what's good for both communities.

He who pays no attention to what his neighbor does, says or thinks, preferring to concentrate on making his own actions appropriate and justifiable, better uses his time.

Truth and ceremony are two things.

Everything is only for a day, both that which remembers and that which is remembered. Observe constantly that all things take place by change, and accustom thyself to consider that the nature of the Universe loves nothing so much as to change the things which are and to make new things like them. For everything that exists is in a manner the seed of that which will be.

The intelligence of the universe is social.