What does Philippians 2:1 mean?

If being connected to the Messiah means anything to you, if love has made any difference in your life, if you’ve ever felt the Spirit’s comfort, if you care about each other at all— Philippians 2:1 - Modern Text Bible

(Paul is appealing to the Philippians’ shared experience of Christ, love, the Spirit, and their mutual concern, as the basis for what he’s about to ask.)