1 John 2:27
But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him.
John warned young believers concerning false teachers. He did not fear that they would be deceived by them, as he knew that all believers received the anointing of the Holy Spirit. Once the Holy Spirit is received, He will never be removed from us. Because we have received the Holy Spirit, we do not need anyone to teach us. This does not mean that the Christian does not need any teaching apart from the Word of God. All we need is the Word of God in our hands and the Spirit of God in our hearts, for the instruction in the truth of God.