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1 Peter 4:8 Updated American Standard Version (UASV)
8 Above all things, have intense love for one another, because love covers a multitude of sins.
This verse is urging believers to prioritize love and to show love and compassion towards others, even if they have made mistakes or sinned. The phrase “love covers over a multitude of sins” suggests that love has the power to forgive and to heal relationships that have been damaged by sin.
The overall message of this verse is one of unity and forgiveness within the Christian community. It encourages believers to put aside their differences and to show love and compassion towards one another, despite any flaws or mistakes.
8. Above all hold unfailing your love for one another (cf. notes on the related verb for love [agapaō] at 1:22). Unfailing inadequately translates ektenēs, which here has the adverbial sense of ‘earnestly’. A better translation is therefore ‘keep loving one another earnestly’ (see note on the cognate word ektenōs at 1:22). The reason for doing so is since (or ‘because’) love covers a multitude of sins. Where love abounds in a fellowship of Christians, many small offences, and even some large ones, are readily overlooked and forgotten. But where love is lacking, every word is viewed with suspicion, every action is liable to misunderstanding, and conflicts abound—to Satan’s perverse delight (cf. Heb. 12:15; by contrast, 1 Cor. 13:4–7). A similar idea is expressed in Proverbs 10:12: ‘Hatred stirs up strife, but love covers all offences.’
By Wayne A. Grudem and Edward D. Andrews
 Wayne A. Grudem, 1 Peter: An Introduction and Commentary, vol. 17, Tyndale New Testament Commentaries (Downers Grove, IL: InterVarsity Press, 1988), 181.