Diogenes Laërtius

"Old age is the harbor of all ills."

"There is a written and an unwritten law. The one by which we regulate our constitutions in our cities is the written law; that which arises from customs is the unwritten law."

"Just step aside for me to enjoy the sunshine."

"Ignorance plays the chief part among men, and the multitude of words."

"Let no one be slow to seek wisdom when he is young nor weary in search thereof when he is grown old. For no age is too early or too late for the health of the soul. And to say that the season for studying philosophy has not yet come, or that it is past and gone, is like saying that the season for happiness is not yet or that it is now no more."

"Once Diogenes, who was washing vegetables, ridiculed him as he passed by, and said, "If you had learnt to eat these vegetables, you would not have been a slave in the palace of a tyrant." But Aristippus replied, "And you, if you had known how to behave among men, would not have been washing vegetables."