Biblical love is command-driven rather than feeling-driven. In other words, it is a response to God's commands rather than a self-centeredness. Moreover, it is not biblical until it has been exercised.
Philippians 1:1-5, An Introduction to Gospel Unity
Philippians Review: Chapters 3-4
Philippians Review: Chapters 1-2
Philippians 4:15-23
Paul continues to give attention to the Philippians' generosity in these verses (4:10-20) and points out: 1) their uniqueness (in supporting him), 2) their reward (from God) and 3) God's provision (to meet their needs). Paul then concludes his letter with final words of greeting and one last prayer (4:21-23).