The Epistles of Ignatius

Now the more any one sees the bishop keeping silence, the more ought he to revere him. For we ought to receive every one whom the Master of the house sends to be over His household, as we would do Him that sent him. It is manifest, therefore, that we should look upon the bishop even as we would upon the Lord Himself. And indeed Onesimus himself greatly commends your good order in God, that ye all live according to the truth, and that no sect has any dwelling-place among you. Nor, indeed, do ye hearken to any one rather than to Jesus Christ speaking in truth.