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.”

“"And ye have no need that any man teach you, because His unction teacheth you concerning all things." Then to what purpose is it that "we," my brethren, teach you? If "His unction teacheth you concerning all things," it seems we labor without a cause. And what mean we, to cry out as we do? Let us leave you to His unction, and let His unction teach you. But this is putting the question only to myself: I put it also to that same apostle: let him deign to hear a babe that asks of him: to John himself I say, Had those the unction to whom thou wast speaking? Thou hast said, "His unction teacheth you concerning all things." To what purpose hast thou written an Epistle like this? what teaching didst "thou" give them? what instruction? what edification? See here now, brethren, see a mighty mystery. The sound of our words strikes the ears, the Master is within. Do not suppose that any man learns ought from man. We can admonish by the sound of our voice; if there be not One within that shall teach, vain is the noise we make. Aye, brethren, have ye a mind to know it? Have ye not all heard this present discourse? and yet how many will go from this place untaught! I, for my part, have spoken to all; but they to whom that Unction within speaketh not, they whom the Holy Ghost within teacheth not, those go back untaught. The teachings of the master from without are a sort of aids and admonitions. He that teacheth the hearts, hath His chair in heaven. Therefore saith He also Himself in the Gospel: "Call no man your master upon earth; One is your Master, even Christ." Let Him therefore Himself speak to you within, when not one of mankind is there: for though there be some one at thy side, there is none in thine heart. Yet let there not be none in thine heart: let Christ be in thine heart: let His unction be in the heart, lest it be a heart thirsting in the wilderness, and having no fountains to be watered withal.”

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