Ryan McClure, focusing on the metaphor in Proverbs 27:17 about iron sharpening iron, poses the question as to whether we can really sharpen a friend's countenance. Considering how a blade, whether used in agriculture, as a tool, or weapon, is sharpened, we. . .
Honing a blade re-forms or re-aligns the blade, while sharpening removes metal to expose or create a sharper edge. This happens within friendship, too.
How do we 'sharpen' another's countenance? Most importantly, the imagery implies proximity, closeness. Nothing can be sharpened unless there is contact.
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