This Scripture tells us that only our constant faith choices will shield, cover and protect us from the attacks of the enemy. This shield was so effective and so strong in protecting the warrior, that the enemy's arrows were not able to penetrate it. So it is with our choices. The only way we can protect ourselves from the onslaught of the enemy's arrows is by choosing, by faith, to trust God, regardless of what we think or feel. If we don't make faith choices , but simply go along with the tide of our emotions, then we'll drop our shield and open ourselves up for the devil's schemes.
Salvation means to save or to heal, to deliver or to bring into safety.
Salvation not only means freedom from the penalty of sin, but also freedom from the power of sin. As we choose to put on that helmet of salvation over our surrendered soul, we'll be freed from Satan's attacks and God's Life will be able to come forth. It's critical that we constantly pray and beseech God on behalf of our brothers and sisters in the Lord. Prayer is our communication line to God , not only for ourselves but also for those we love, even for those who have spitefully used us. This is always my prayer just before I give a lecture.