1 John 5:18-21 — Satan cannot lay a finger on a child of God without a permission slip signed in heaven. These are the five closing certainties of 1 John. This expository preaching message closes our verse-by-verse series through the book of 1 John, working through five certainties packed into the final four verses: we don't live in sin, we are kept, we know whose side we're on, we know the Son has come, and we know Him that is true. If you've ever wondered about your assurance of salvation — if guilt has convinced you that one bad week disqualifies you, or fear has convinced you that Satan can do whatever he wants to you — this message settles both. Your standing is sealed. Your walk is still your own to guard. This is verse-by-verse exposition, not topical commentary. The text moves from what "sinneth not" actually means, into the doctrine of eternal security versus self-keeping, into Satan's limits under God's permission, and finally into the highest declaration made about Jesus Christ anywhere in the letter — "This is the true God and eternal life." This expository preaching message through 1 John explains: - What "born of God sinneth not" really means (it's not sinless perfection) - The difference between being kept by God and keeping your own walk - Why Satan cannot touch a believer without permission (Job 1-2) - What it means that "the whole world lieth in wickedness" - Four things Christ's coming gave every believer - Why the least-lettered believer has understanding the world's wisest don't - The highest title given to Jesus Christ in the entire letter - The closing warning: "keep yourselves from idols"