Revelation 2:4 directly parallels—the Ephesian church's abandoned first love matches Jesus' warning that love will grow cold.

Revelation 2:5 adds the call to repentance and threat of removal—the remedy for the cooling love Jesus warns about.

James 4:1-4 traces lovelessness to worldly desires and quarrels—showing how iniquity causes love to cool.

Romans 12:11 exhorts zeal and fervor, directly opposing the cold love described here. It calls for active service.

James 5:1-6 condemns rich oppressors whose greed and injustice exemplify the lawlessness that chills love.

Revelation 3:15 rebukes lukewarmness—a spiritual condition akin to the love waxing cold Jesus describes.