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.
References for 1 John 2:18
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.
But you have an anointing from the Holy One, and you know all things.
References for 1 John 2:20
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.