Even amid thoughts of his own death, Paul is concerned for the Philippians. We tend to think our suffering justifies at least a little selfishness. Have you ever thought to yourself, “Times are real tough right now. Maybe under normal circumstances this would not be right. But God understands. I have a lot on my plate.” No sign of that in Paul. Paul’s chief concern, even when his own life is threatened, is the furtherance of the gospel in the lives of the Philippians.
– Mark Dever, The Message of the New Testament: Philippians:Humility