In spite of all the good things about the church in Ephesus, Jesus makes one charge against them in Revelation 2:4. Different English translations word it in various ways:
Yet I hold this against you: You have forsaken the love you had at first. (NIV)
Nevertheless I have somewhat against thee, because thou hast left thy first love. (KJV)
But I have this against you, that you have abandoned the love you had at first. (NKJV)
But I have this against you, that you have abandoned the love you had at first. (ESV)
But I have this complaint against you. You don’t love me or each other as you did at first! (NLT)
Most people usually seem to interpret this loss or abandonment of the Ephesian church's first love as being about their love for Jesus. But notice how the New Living Translation includes the possibility that Jesus could be talking about the Ephesian believers' love for one another.