Ephesians 6:13. “Wherefore take unto you the whole armor of God, that ye may be able to withstand in the evil day, and having done all, to stand.”
The whole armor of God: We are to arm ourselves against the attacks of Satan and the evil spirits who work for him. Each piece of armor has a specific use and purpose. Notice, however, that there is no armor mentioned to protect the back. It is clear that we are not to turn and run. We are to stand and face the enemy, and when we have done that, we are to keep standing. We are never told to chase after Satan. Just to stand.
Withstand in the evil day: Most commentaries I’ve checked translate this phrase as “being able to stand against evil in its day of power.” Surely we are seeing the power of evil in our own times, as people have seen it in their day all through history. Never forget that although Satan is not omnipotent, omnipresent, omniscient, he is still powerful. We need to be watchful and prepared.
Having done all, to stand: Again, the commentaries I’ve consulted agree that this indicates victory for the believer when that person has donned the armor of God, fought the battle, and come out victorious. Keep in mind that believers down through the ages who have lost their lives to Satan’s wiles are still victorious in the Lord.
We can’t lose. “For me to live is Christ, and to die is gain.” Philippians 1:21.