The quotation is not from the canonical gospels. Eusebius (iii. 36) says he does not know from what source it comes. Jerome states it to be derived from the gospel lately translated by him, the gospel according to the Hebrews (Vir. Ill. 2). Origen ascribes the words to the “Doctrina Petri.” (de Princ. Præf. 8) Bp. Lightfoot, by whom the matter is fully discussed, (Ap. Fath. pt. II. Vol. ii. p. 295) thinks that either Jerome, more suo, was forgetful, or had a different recension of the gospel to the Hebrews from that used by Origen and Eusebius. Ignatius may be quoting a verbal tradition. Bp. Lightfoot further points out that Origen (l. c.) supposes the author of the Doctrina Petri to use this epithet ἀσώαατον not in its philosophical sense (= incorporeal) but as meaning composed of some subtle substance and without a gross body like man. Further Origen (c. Cels. V. 5) warns us that to Christians the word dæmon has a special connotation, in reference to the powers that deceive and distract men.