As Paul speaks of the bold advance of the gospel in this passage, he says something that has brought great conviction in accordance with the sermon and this video from Sunday. In verse 27 he writes, "Only let your manner of life be worthy of the gospel of Christ, so that whether I come and see you or am absent, I may hear of you that you are standing firm in one spirit, with one mind striving side by side for the faith of the gospel," (ESV, emphasis mine).