Proverbs says hatred stirs up strife but love covers sins; 1 Peter urges fervent love because love covers a multitude of sins.

James and 1 Peter both use the distinctive “multitude of sins” covering/hiding language. The approved evidence supports the relationship at its existing confidence level without requiring a stronger quotation, fulfillment, or typology claim than the texts warrant.

Both letters answer eschatological expectation with transformed conduct rather than speculation: prayer, love, hospitality, and service in 1 Peter; holy conduct and godliness under the hope of new heavens and new earth in 2 Peter.

The same adjective poikilos (“manifold/varied”) describes the readers’ many-sided trials in 1:6 and God’s many-sided grace in 4:10.

First Peter 4:11 closes with glory and dominion through Jesus Christ “for ever and ever. Amen”; Revelation 1:6 uses the same glory-and-dominion doxological shape immediately after describing Christ making a kingdom of priests.