Verse 21.— Little children, keep yourselves from idols. Amen. Keep yourselves from worshiping idols is the thought. Flee from it! There have been idols in every age of the world's history; there are idols now; these, the Christian must shun. Whatever leads us away from the true worship of God is an idol to be avoided. John, having so spoken, concludes his letter with a solemn Amen.