Ambrosiaster : Paul is rebuking the people whose wrongful behavior has started the quarrels. Not only are they liable to be charged for the fraud which they have committed; they also share in the fault of those who, compelled by their injurious or fraudulent actions, call upon unbelievers to pass judgment. — COMMENTARY ON PAUL'S EPISTLES John Chrysostom : "Nay, ye yourselves do wrong, and defraud, and that your brethren." Again, it is a twofold crime, perhaps even threefold or fourfold. One, not to know how to bear being wronged. Another, actually to do wrong. A third, to commit the settlement of these matters even unto the unjust. And yet a fourth, that it should be so done to a brother. For men's offences are not judged by the same rule, when they are committed against any chance person, and towards one's own member. For it must be a greater degree of recklessness to venture upon that. In the other case, the nature of the thing is alone trampled on; but in this, the quality of the person also. — Homily on 1 Corinthians 16