For the protection of the head, as worn by warriors. See ARMOUR. In the Christian's armour the helmet is 'salvation,' or 'the hope of salvation.' Ephesians 6:17; 1 Thessalonians 5:8 . It is those who know their salvation that can take part against the wicked spirits in the heavenlies. It is to be remarked that Jehovah (Christ) in a future day will Himself put on righteousness as a breastplate, and a helmet of salvation, to avenge His people by punishing their enemies. Isaiah 59:17 .