For all that is in the world--the lust of the flesh, the lust of the eyes, and the pride of life--is not of the Father but is of the world.
And the world is passing away, and the lust of it; but he who does the will of God abides forever.
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.
Who is a liar but he who denies that Jesus is the Christ? He is antichrist who denies the Father and the Son.
Whoever denies the Son does not have the Father either; he who acknowledges the Son has the Father also.
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.