Dear children, the last hour is here. You have heard that the Antichrist is coming, and already many such antichrists have appeared. From this we know that the end of the world has come.
These people left our churches because they never really belonged with us; otherwise they would have stayed with us. When they left us, it proved that they do not belong with us.
But you are not like that, for the Holy Spirit has come upon you, and all of you know the truth.
References for 1 John 2:20
So I am writing to you not because you don't know the truth but because you know the difference between truth and falsehood.
And who is the great liar? The one who says that Jesus is not the Christ. Such people are antichrists, for they have denied the Father and the Son.
Anyone who denies the Son doesn't have the Father either. But anyone who confesses the Son has the Father also.
So you must remain faithful to what you have been taught from the beginning. If you do, you will continue to live in fellowship with the Son and with the Father.
And in this fellowship we enjoy the eternal life he promised us.
I have written these things to you because you need to be aware of those who want to lead you astray.
But you have received the Holy Spirit, and he lives within you, so you don't need anyone to teach you what is true. For the Spirit teaches you all things, and what he teaches is true -- it is not a lie. So continue in what he has taught you, and continue to live in Christ.
References for 1 John 2:27
And now, dear children, continue to live in fellowship with Christ so that when he returns, you will be full of courage and not shrink back from him in shame.