Proverbs 17:3 speaks of the refining of silver and gold, likening it to the testing of hearts by the Lord. 1 Peter 1:7 uses the metaphor of refining to describe the testing of faith, which is more precious than gold.
Proverbs 17:9 emphasizes the importance of covering offenses to promote love, which is echoed in 1 Peter 4:8, where love is said to cover a multitude of sins.
Proverbs 17:17 highlights the constancy of a friend and the love of a brother. John 15:13 speaks of the greatest love being shown by laying down one's life for friends, exemplifying ultimate friendship and love.
Proverbs 17:22 speaks of a cheerful heart being good medicine, while Philippians 4:4 encourages believers to rejoice in the Lord always, highlighting the importance of joy in spiritual and physical well-being.
Proverbs 17:27 advises restraint in speech and a calm spirit, which is mirrored in James 1:19, where believers are encouraged to be quick to listen, slow to speak, and slow to anger.