Withstand him steadfast in your faith, knowing that your brothers who are in the world are undergoing the same sufferings.
The words,that are in the world, may be explained in two ways, either that God proves his faithful people indiscriminately everywhere in the world, or that the necessity of fighting awaits us as long as we are in the world. But we must observe that having said before that we are assailed by Satan, he then immediately refers to every kind of afflictions. We hence gather that we have always to do with our spiritual enemy, however adversities may come, or whatever they may be, whether diseases oppress us, or the barrenness of the land threatens us with famine, or men persecute us. 