 Certainly, Jesus wasn't contradicting the law of the Old Testament, the prescriptions with regard to making oaths in the Old Testament. And so something else is going on, and that's precisely what we see as Jesus continues his teaching here. He says, don't take an oath at all, either by heaven, for it is the throne of God, or by the earth, for it is his footstool, or by Jerusalem, for it is the city of the great king. And do not take an oath by your head, for you cannot make one hair white.