The reading is from St. Paul's Letter to the Philippians 1:27-30; 2:1-4

Brethren, 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 stand firm in one spirit, with one mind striving side by side for the faith of the gospel, and not frightened in anything by your opponents. This is a clear omen to them of their destruction, but of your salvation, and that from God. 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, engaged in the same conflict which you saw and now hear to be mine. So if there is any encouragement in Christ, any incentive of love, any participation in the Spirit, any affection and sympathy, complete my joy by being of the same mind, having the same love, being in full accord and of one mind. Do nothing from selfishness or conceit, but in humility count others better than yourselves. Let each of you look not only to his own interests but also to the interests of others.