In the heat of battle, a soldier’s breastplate protected his most vital organs—without it, he wouldn’t stand a chance against the enemy’s strikes. Paul uses this image in Ephesians 6 to remind us that in the unseen spiritual war, our protection is not our own goodness, morality, or religious effort—because those will always fall short. Instead, our defense is the righteousness of Christ, given to us by grace through faith. This breastplate guards the very core of who we are, securing our identity and confidence before God. When we put it on—both by trusting in what Christ has already done and by walking it out in daily obedience—we are able to stand firm against guilt, lies, and the enemy’s accusations, knowing that God Himself covers us with His perfect righteousness.