Prefer knowledge to wealth, for the one is transitory, the other perpetual.

Do not be angry with me if I tell you the truth

It is better to suffer an injustice than to commit one

It is a disgrace to grow old through sheer carelessness before seeing what manner of man you may become by developing your bodily strength and beauty to their highest limit.

As to marriage or celibacy, let a man take which course he will, he will be sure to repent

I am wiser than this man, for neither of us appears to know anything great and good; but he fancies he knows something, although he knows nothing; whereas I, as I do not know anything, so I do not fancy I do. In this trifling particular, then, I appear to be wiser than he, because I do not fancy I know what I do not know.

The Delphic Oracle said I was the wisest of all the Greeks. It is because that I alone, of all the Greeks, know that I know nothing.