There's a verse for that:
Philippians 1:27-28
Life Worthy of the Gospel
27 Whatever happens, conduct yourselves in a manner worthy of the gospel of Christ. Then, whether I come and see you or only hear about you in my absence, I will know that you stand firm in the one Spirit,[a] striving together as one for the faith of the gospel 28 without being frightened in any way by those who oppose you. This is a sign to them that they will be destroyed, but that you will be saved—and that by God.