1 Peter 5:9

Whom resist
By no means give way to him, by indulging any sin, or yielding to any temptation, but oppose him, and stand against his wiles, his cunning and his power:

steadfast in the faith;
both in the doctrine of faith, which Satan endeavours to remove from, or cause to stagger in; and in the grace of faith, exercising it on the promises of God, and his perfections, particularly his power and faithfulness concerned in them, and in the blood, righteousness, sacrifice, and person of Christ, which faith is capable of making use of, as a shield, to good purpose, against all the fiery darts of Satan; as also in a profession of faith, which, as it should be held fast without wavering, and which the devil is very busy to keep persons from making, or to cause them to drop it when they have made it, by violent suggestions, strong temptations, and a flood of reproaches and persecutions; all which should be disregarded:

knowing that the same afflictions are accomplished in your brethren
that are in the world;
and therefore should not be surprised and staggered by them, nor think them strange, but endure them without murmuring, and with patience and cheerfulness; since they are the "same afflictions" and trials which others have been exercised with in all ages: the same which the fraternity, or "brotherhood", as the word signifies, see ( 1 Peter 2:17 ) who stand in the same relation to God and Christ as they do, endure; yea, the same which Christ himself, who stands in this relation to them, has endured: and which must be expected while they are "in the world"; but this is the great mercy, that they are only endured in this world; there will be none in the world to come; they will be "accomplished" and finished here; and every believer has his measure, which must be filled up; and so has the whole of Christ, his church, and when they are fulfil they will be no more.