Philippians 1:27-30 (ESV)

²⁷ Only let your manner of life be worthy^[a] 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, ²⁸ and not frightened in anything by your opponents. This is a clear sign to them of their destruction, but of your salvation, and that from God. ²⁹ For it has been granted to you that for the sake of Christ you should not only believe in him but also suffer for his sake, ³⁰ engaged in the same conflict that you saw I had and now hear that I still have.