Biblion Bible Commentary
Read the introduction to 1 John · About this commentary
Not in Word, but in Deed
1 John 3:16-18
16 By this we know love, because he laid down his life for us. And we ought to lay down our lives for the brothers. · WEB
Love is defined by a single act and then measured by a very small one, and the distance between them is the point.
Verse 16 defines the word the letter has been using throughout. By this we know love: he laid down his life for us. The definition is an event rather than a quality, and the letter does not describe the feeling that accompanied it.
The conclusion drawn is immediate and unqualified: we ought to lay down our lives for the brothers. The debt word is used, the same one applied earlier to walking as he walked 1 John 2:6.
Then verse 17 does something unexpected. Having raised the standard to dying, the letter drops to the smallest possible case — someone with the world's goods who sees a brother in need and closes his heart. Not a martyr's test but a purse and a decision, and it is put as a question rather than a rule: how does God's love remain in him?
The descent is deliberate. A standard set at death is safely out of reach for most people most days, and the letter refuses to let it stay there. The one who cannot manage the small case has no claim on the large one.
Verse 18 closes with the summary, and the pairing is precise. Not in word or tongue — the two ways love can be expressed without costing anything — but in deed and truth. Truth is placed on the side of action again, which is where this letter has kept it from the beginning 1 John 1:6.
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