Augustine of Hippo, on 1John 4:6

“We are of God. He that knoweth God, heareth us. He that is not of God, heareth us not. By this we know the spirit of truth, and the spirit of error.”

“"We are of God." Let us see why; see whether it be for any other thing than charity. "We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and of error:" namely by this, that he that heareth us hath the spirit of truth; he that heareth not us, hath the spirit of error. Let us see what he adviseth, and let us choose rather to hear him advising in the spirit of truth, and not antichrists, not lovers of the world, not the world. If we are born of God, "beloved," he goes on-see above from what: "We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and of error:" aye, now, he makes us eagerly attentive: to be told that he who knows God, hears; but he who knows not, hears not; and that this is the discerning between the spirit of truth and the spirit of error.”

Imported from an open dataset — not yet checked against the printed edition.