“As for you, what you have heard from the beginning must remain in you. If what you heard from the beginning remains in you, you also will remain in the Son and in the Father.”
1 John 2.24
John follows up his warning about false teachers with this imperative and promise. Christians know the truth and ought to remain in it. In this faithfulness to the original gospel is the promise of eternal life, v. 25.
Many have left the original message for a false teaching. While what we heard from the beginning remains in us, we must call others to return to it. This is the restoration appeal.