1 John 2:24-27

So you must remain faithful to what you have been taught from the beginning. If you do, you will remain in fellowship with the Son and with the Father. And in this fellowship we enjoy the eternal life he promised us. I am writing these things to warn you about 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 everything you need to know, and what he teaches is true—it is not a lie. So just as he has taught you, remain in fellowship with Christ.