What does the Bible say about the church's first love?

In Revelation 2:4, the Lord rebukes the church at Ephesus for leaving their first love, which symbolizes their initial fervor and devotion to Christ. This passage indicates that while they maintained good works and were diligent in their faith, they had allowed their passionate love for Christ to wane. This love is akin to the joy and fervor one experiences at the beginning of a relationship, where communication and closeness are paramount. The Lord urges the church to remember the heights of their initial devotion and to rekindle that passion through repentance and the resumption of their first works, which include prayer, worship, and fellowship with Him.