The helmet of salvation concerns the assurance of our salvation and the confidence it brings for the battle.

Salvation-
• Forgiveness of sins
• Deliverance from Satan’s bondage
• Adoption as children of God
• Resurrection glory

WCF 18.2 This certainty is not a bare conjectural and probable persuasion, grounded upon a fallible hope; but an infallible assurance of faith, founded upon the divine truth of the promises of salvation, the inward evidence of those graces unto which these promises are made, the testimony of the Spirit of adoption witnessing with our spirits that we are the children of God; which Spirit is the earnest of our inheritance, whereby we are sealed to the day of redemption.