Helmet of Salvation

Ephesians 6:17a

'Take the helmet of salvation...'

This is the last piece of Armour which we are commanded to take up, but without it there is absolutely no use to wearing the others. Salvation is our biggest defense against Satan. Any other wound usually will not kill a person, but a wound to the head basically means instant death. Once wearing the helmet of salvation We have no fear, we are protected from the worst of Satan's attacks. As Christians, if we die but are saved, we are going to heaven. We have no fear in death, or persecution or any of Satan's other attacks, because we know that the worst he can do to us is kill us, and death is just the doorway to heaven. 

The word used for 'take up' can also be translated to 'receive' - we do not save ourselves, God saves us. We have no part in it, God created us, he sustains us and he worked through our salvation to completion. God saves us, he deserves all glory for it, none to us. We have assurance of salvation and confidence of heaven for eternity. Satan will seek to take that assurance from us, but we must hold firm to God.

Isaiah 59:17

He put on righteousness like a breastplate,

And a helmet of salvation on His head;

And He put on garments of vengeance for clothing

And wrapped Himself with zeal as a mantle.