Augustine of Hippo, on 1John 2:27

“And as for you, let the unction, which you have received from him, abide in you. And you have no need that any man teach you; but as his unction teacheth you of all things, and is truth, and is no lie. And as it hath taught you, abide in him.”

“Ye remember, brethren, that yesterday's lesson was brought to a close at this point, that "ye have no need that any man teach you, but the unction itself teacheth you concerning all things." Now this, as I am sure ye remember, we so expounded to you, that we who from without speak to your ears, are as workmen applying culture from without to a tree, but we cannot give the increase nor form the fruits: but only He that created and redeemed and called you, He, dwelling in you by faith and the Spirit, must speak to you within, else vain is all our noise of words. Whence does this appear? From this: that while many hear, not all are persuaded of that which is said, but only they to whom God speaks within. Now they to whom He speaks within, are those who give place to Him: and those give place to God, who "give not place to the devil." For the devil wishes to inhabit the hearts of men, and speak there the things which are able to seduce. But what saith the Lord Jesus? "The prince of this world is cast out." Whence cast out of heaven and earth, out of the fabric of the world? Nay, but out of the hearts of the believing. The invader being cast out, let the Redeemer dwell within: because the same redeemed, who created. And the devil now assaults from without, not conquers Him that hath possession within. And he assaults from without, by casting in various temptations: but that person consents not thereto, to whom God speaks within, and the unction of which ye have heard. "And it is true," namely, this same unction; i.e. the very Spirit of the Lord which teacheth men, cannot lie: "and is not false."”

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