16Jesus answered them, and said, My doctrine is not mine, but his that sent me. 17If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself. 18He that speaketh of himself seeketh his own glory: but he that seeketh his glory that sent him, the same is true, and no unrighteousness is in him. 19Did not Moses give you the law, and yet none of you keepeth the law? Why go ye about to kill me?20The people answered and said, Thou hast a devil: who goeth about to kill thee? 21Jesus answered and said unto them, I have done one work, and ye all marvel. 22Moses therefore gave unto you circumcision; (not because it is of Moses, but of the fathers;) and ye on the sabbath day circumcise a man.