Apophthegm Quotes

As some say, Solon was the author of the apophthegm, "Nothing in excess. (Diogenes Laërtius)
The apophthegm "Know thyself" is his. View quote
Diogenes Laërtius
In his old age he [Thales] received by common consent the title of sophos, or sage; and when Greece came to name its Seven Wise Men it placed Thales first. Being asked what was very difficult, he answered, in a famous apophthegm, "To know thyself.” Asked what was very easy, he answered, "To give advice.” To the question, what is God? he replied, "That which has neither beginning nor end.” Asked how men might live most virtuously and justly, he answered, "If we never do ourselves what we blame in others.”. View quote
Will Durant