Let deacons be husbands of one wife, ruling their children and their own houses well.

 We may well ask why it should be necessary to lay down what looks obvious. We must understand the state of the world in which this was written. It has been said, and with much truth, that the only totally new virtue which Christianity brought into this world was chastity. In many ways the ancient world was in a state of moral chaos, even the Jewish world. Astonishing as it may seem, certain Jews still practised polygamy. In the Dialogue with Trypho, in which Justin Martyr discusses Christianity with a Jew, it is said that "it is possible for a Jew even now to have four or five wives" (Dialogue with Trypho, 134). Josephus can write: "By ancestral custom a man can live with more than one wife" (Antiquities of the Jews, 17: 1, 2). 