The Epistles of Ignatius

Let not then any one deceive you, as indeed ye are not deceived, inasmuch as ye are wholly devoted to God. For since there is no strife raging among you which might distress you, ye are certainly living in accordance with God’s will. I am far inferior to you, and require to be sanctified by your Church of Ephesus, so renowned throughout the world. They that are carnal cannot do those things which are spiritual, nor they that are spiritual the things which are carnal; even as faith cannot do the works of unbelief, nor unbelief the works of faith. But even those things which ye do according to the flesh are spiritual; for ye do all things in Jesus Christ.