A common misinterpretation treats the phrase 'ye know all things' as granting believers literal omniscience or encyclopedic knowledge of every subject, ignoring the context of spiritual discernment against doctrinal error; others view the 'unction' as a separate mystical experience or physical anointing rather than the indwelling Holy Spirit received by all Christians at conversion, or wrongly apply it to justify ignoring Scripture in favor of subjective personal revelations.
I John 2:20
King James Version (1769)
20 But ye have an unction from the Holy One, and ye know all things.
This verse assures true believers that they possess an anointing from the Holy One, referring to the Holy Spirit imparted at salvation, which grants them spiritual discernment and knowledge of essential truths, particularly the ability to recognize and reject the lies of false teachers who deny that Jesus is the incarnate Christ, distinguishing genuine faith from deception in the context of first-century heresies like Gnosticism.