Why does Peter ask about forgiveness?
Why does Peter ask about forgiveness in Matthew 18:21?

Passage Citation

“Then Peter came to Jesus and asked, ‘Lord, how many times shall I forgive my brother who sins against me? Up to seven times?’” (Matthew 18:21)


Immediate Narrative Setting

Matthew 18 forms a single teaching unit on kingdom relationships. Verses 15-20 lay out the procedure for restoring a sinning brother. In that light Peter’s question arises naturally: once reconciliation is pursued, how often must it be repeated? His inquiry is not theoretical; it grows out of Jesus’ just-delivered instruction on church discipline.


Peter’s Personal Disposition

Peter is consistently the spokesman (cf. Matthew 14:28; 16:16). His penchant for bold, measurable commitments (“I will lay down my life for You,” John 13:37) surfaces here. By offering the numeric figure “seven,” Peter displays both eagerness to please the Lord and a desire for concrete boundaries.


Rabbinic Background

Second-Temple Jewish sages, drawing on Amos 1–2, taught that forgiving three times fulfilled righteousness (b. Yoma 86b; t. B.Q. 8:14). Peter more than doubles the accepted limit, suggesting a complete (sevenfold) generosity while still assuming a cap exists.


Symbolism of the Number Seven

Throughout Scripture seven signifies completion (Genesis 2:2-3; Leviticus 25:8). Peter’s choice signals the maximum completeness he can imagine. Jesus’ reply (“seventy-seven” or “seventy times seven,” v. 22) explodes any arithmetical ceiling, pushing forgiveness into the realm of the limitless, echoing Lamech’s boast inverted for grace (Genesis 4:24).


Theological Motive: Reflecting Divine Forgiveness

Human forgiveness mirrors God’s own character (Exodus 34:6-7). Peter’s question prompts Jesus to tell the parable of the unforgiving servant (vv. 23-35), anchoring interpersonal mercy in the incalculable debt forgiven by the King. The inquiry thus becomes the springboard for revealing the gospel pattern: received grace must become extended grace (Ephesians 4:32; Colossians 3:13).


Ecclesial Ethics and Community Health

Matthew is the only Gospel to use the word “church” (18:17). Unlimited forgiveness preserves unity, disrupts cycles of retaliation, and nurtures the countercultural community Jesus envisions. Peter’s pursuit of a numeric rule shows early disciples wrestling with practical outworking of kingdom ideals.


Archaeological Corroboration

First-century Capernaum’s excavated insulae expose tight living quarters where interpersonal friction would be common, lending concrete plausibility to questions of repeated offense and forgiveness among close neighbors, including Peter’s own household (cf. Matthew 8:14).


Why Peter Asks—Summary

1. He responds directly to Jesus’ new teaching on restoring the erring brother.

2. He reflects prevailing rabbinic debate, stretching accepted limits yet still assuming limits exist.

3. He embodies a disciple’s desire for measurable obedience.

4. His question serves providentially to unveil Jesus’ radical principle of boundless mercy rooted in God’s own nature.


Practical Application

Believers today confront identical concerns: How far does forgiveness go? Peter’s question legitimizes the struggle while Jesus’ answer removes the ceiling, calling disciples to model divine grace. The certainty of Christ’s resurrection, attested by over five hundred eyewitnesses (1 Corinthians 15:6) and by the empty tomb, guarantees the power to live this ethic through the indwelling Spirit (Romans 8:11).


Key Cross-References

Luke 17:3-4; Mark 11:25; Proverbs 24:17; Psalm 103:10-12.

How many times should we forgive others according to Matthew 18:21?
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