Reference

Ephesians 6:17

The helmet of salvation is the next piece of armor that is given by God to His people. This piece of armor is attached to the shield of faith in that they are both taken up and put to use. The helmet of salvation is not salvation itself, rather it is the assurance of one's salvation in this life and leading to the future "hope" of salvation that comes for all eternity. Paul is wanting the Ephesian Christians to be assured that they are saved and that this piece of armor is suitable for the attacks of the enemy who would seek to dissuade us from having any assurance at all in God's saving work. As the 17th century Puritan William Gurnall wrote, "assurance of salvation is the chief area that the devil fires his arrows upon." In response, dear Christian, be ready and receive the helmet of salvation.