Antiphon came to Socrates with the intention of drawing his companions away from him, and spoke thus in their presence. “Socrates, I supposed that philosophy must add to one’s store of happiness. But the fruits you have reaped from philosophy are apparently very different. For example, you are living a life that would drive even a slave to desert his master. Your meat and drink are of the poorest: the cloak you wear is not only a poor thing, but is never changed summer or winter; and you never wear shoes or tunic. Besides you refuse to take money, the mere getting of which is a joy, while its possession makes one more independent and happier. Now the professors of other subjects try to make their pupils copy their teachers: if you too intend to make your companions do that, you must consider yourself a professor of unhappiness.”
To this Socrates replied:
[…] “You seem, Antiphon, to imagine that happiness consists in luxury and extravagance. But my belief is that to have no wants is divine; to have as few as possible comes next to the divine; and as that which is divine is supreme, so that which approaches nearest to its nature is nearest to the supreme.”
[…] For my part, when I heard these words fall from his lips, I judged him to be a happy man himself and to be putting his hearers in the way of being gentlemen.
[Xenophon, Memorabilia 1.6]