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, 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. 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 that you saw I had and now hear that I still have. (Philippians 1:27-30)
The next question is why should we stand? And the answer is that we should do so because of the nature of the truth. Is there anything else that is worth standing for? Look at the zeal and the enthusiasm of the politicians as they stand for their party and see how they will work and argue with people, but what have they to offer and to stand for by comparison with this truth? What a glorious truth! The truth that God has given his own Son, his only begotten Son, and that there is a grand redemption possible to all, one which suffices in this world, and for the next, and to all eternity. What a mighty, glorious truth, what food for the mind, what a stimulus for the heart, what a magnificent truth! Do you need any other exhortation? Truth itself, its very character and nature, is worthy of our standing on the defensive.
– D. Martyn Lloyd-Jones, The Life of Joy: An Exposition of Philippians 1 and 2, (Baker Book House: 1989), 132–133.