Shared ground
Peter supports his call to peace by quoting Scripture (Psalm 34). The quoted lines connect a “good life” with speech that does not harm or deceive, with a real turning away from wrongdoing, and with active peacemaking that is pursued rather than assumed.
The passage also grounds this moral vision in God’s posture: God is attentive to “the righteous” and their prayer, while God is set against those who do evil. That contrast functions as both encouragement and warning within the argument.
Where interpretation differs
A few details are read differently.
Some take “see good days” mainly as present, this-world wellbeing (a stable life, fewer conflicts, a better reputation). Others think it reaches beyond present circumstances to a broader future hope, even if the present includes suffering.
Some read “peace” mostly as harmony inside the Christian community; others include social peace with outsiders and the wider public, especially because the surrounding context focuses on public conduct under pressure.
Some take “the righteous” primarily as people characterized by consistent right behavior (as described in vv. 10–11). Others emphasize covenant identity language and see the behavior as the expected expression of that identity.
Why the disagreement exists
The wording is broad (“good days,” “peace,” “the righteous”) and the letter’s wider setting includes both pressure/suffering and instructions for wise public conduct. That combination leaves room to ask whether the promise language points mainly to improved circumstances, to ultimate outcomes, or to both.
What this passage clearly contributes
Explicitly, the text claims that disciplined speech and honest words belong to the path of a “good life,” that doing good includes actively pursuing peace, and that God’s attention is aligned with the righteous while God opposes evil. By inference (without being directly stated), the quotation supports Peter’s larger point that peacemaking and restrained speech are not merely practical tactics but are actions taken under God’s watchful care (compare the surrounding call to respond to hostility with blessing in 1 Peter 3:9).