Replies

"1 John 2:27 As long as his Spirit remains in you, you do not need anyone to teach you. For his Spirit teaches you about everything, and what he teaches is true, not false."

One of the most abused texts in the entire Bible, and which illustrates the need for such abusers of Holy Writ to be instructed, for it no more means that teachers are superfluous than "But ye have an unction from the Holy One, and ye know all" means that believers are omniscient. (1 John 2:20)

To begin with it is a poor translation, for it better reads,

But the anointing [chrisma] 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 concerning [peri] all, and is truth, and is no lie, and even as taught you, ye shall abide in him. (1 John 2:27)

Second, if this means what isolationist exegesis takes it to mean, then it is blatant contradiction to the rest of Scripture, one in particular being,

And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers; For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ: Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ: (Ephesians 4:11-13) Let him that is taught in the word communicate unto him that teacheth in all good things. (Galatians 6:6)

Thus there must be a meaning to this other than believers never having any need for teachers (not that they always so, or that the latter cannot err). And here the context is (from the preceding verse),

These have I written unto you concerning [peri] them that seduce you. (1 John 2:26)

And which has to do with the essential Truth that these antichrist seducers deny and who thus forsook the Christian communion:

They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us. (1 John 2:19)

I have not written unto you because ye know not the truth, but because ye know it, and that no lie is of the truth. Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son. (1 John 2:21-22) For "the truth" immediately here is that Jesus is the Christ, "who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist." (2 John 7)

Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son. (1 John 2:22) Let that therefore abide in you, which ye have heard from the beginning. If that which ye have heard from the beginning shall remain in you, ye also shall continue in the Son, and in the Father. (1 John 2:24)

Here what is indicated is that of denial of core Truths which the Holy Spirit testifies to the heart from salvation even if the head does not understand it much. Which encompasses that Jesus is the Divine incarnated Christ, being is both. For in calling upon the Lord Jesus for salvation then a believer is implicitly ascribing divinity to the Son of God, for no one can give eternal life (besides possessing other unique attributes and titles of God). Thus a typical mark of a cult is the denial of the unique deity of Christ as one with the Father and Spirit, while these seducers . Along with this Thus Islam

And historically it is thought that "concerning them that seduce you" refers to those who denied that Christ was truly incarnated, but like as thought to be taught within Gnosticism and Docetism, was like a phantom who only appeared human but was not actually incarnated and thus would feel pain, and who was actually crucified and died and rose again. And that salvation was thru attaining secret esoteric knowledge which required gurus teaching such for attaining eternal life. Which is what "ye have no need that anyone teach you" would refer to, meaning not needing such to know what the Spirit witnesses to every believer, who has experienced the risen Christ by belief in the Truth of Scripture. These are essential ;

In contrast to which is Islam with its satanic "prophet" who said,

And because of their saying: We slew the Messiah, Jesus son of Mary, Allah's messenger — they slew him not nor crucified him, but it appeared so unto them; and lo! those who disagree concerning it are in doubt thereof; they have no knowledge thereof save pursuit of a conjecture; they slew him not for certain. But Allah took him up unto Himself. Allah was ever Mighty, Wise. [Quran 4:157-158 Some other thoughts on this here.