1 John 2:18-21, 24-27; 1 Corinthians 8:2
"Little children, it is the last hour; and as you have heard that the Antichrist is coming, even now many antichrists have come, by which we know that it is the last hour. They went out from us, but they were not of us: for if they had been of us, they would have CONTINUED WITH US, but they went out that they might be made manifest, that none of them were of us." (Us: John, Paul, Peter etc...)
"But you have an anointing from the Holy One (Jesus Christ) and you know all things. I have not written to you because you do not know the truth, but because you know it, and that no lie is of the truth." These had an understanding from/of the Holy One which empowered them to continue with what John, Paul, Peter...etc. were teaching and doing.
"Therefore, let that abide in you which you heard from the beginning. If what you heard from the beginning abides in you, you also will abide in the Son and in the Father. And this is the promise that He has promised us - eternal life. These things I have written to you concerning those who try to deceive you. But the anointing which you have received from Him abides in you, and you do not need that anyone teach you; but as the same anointing teaches you concerning all things, and is true, and is not a lie, and just as it has taught you, you will abide in Him."
Paul admonished the Corinthian church: "if anyone thinks that he knows anything, he knows nothing yet as he ought to know." Paul could be saying that unless one knows "all things", the things that they think they know will be as good as nothing; that what we think we know could cause us to be puffed up (the leaven of the Pharisee) making no room for the anointing of the Holy One; that knowing "all things" from the Holy One, who is love, will edify (build up) us and others for eternal life.
"He who did not spare His own Son, but delivered Him up for us all, how shall He not, with Him, freely give us ALL THINGS?" (Romans 8:32)
Our Master, who sits at the right hand of God, will reveal this to you by the Holy Spirit, making what is written alive and eternal!