Paul is writing a letter, but he is under guard in prison (we have come to Ephesians 6:10-20). He uses the picture, setting faith in the ordinary world – even his. We can imagine him listening to soldiers boasting of old campaigns.
He asks first, Who is the enemy? The temptation is to identify a person, a party, an opinion. All mistakes. “we are not fighting against human beings but against the wicked spiritual forces “ (Ephesians 6:12) This is very important – there is a Christian fight. We may not like violence – and that is good – but faith is not a genteel discussion, but a struggle. To live as a Christian is to face opposition, difficulty, and temptation.
Paul picks up the soldier’s equipment to explain. (Perhaps he watched the guard coming on duty shed the gear in which they had just been inspected?). We notice the need for practice and experience (verse 13). (In passing we might add that the Roman army used discipline and working together to overcome larger numbers). What does he examine? The belt is Truth. It’s not about winning the argument, but about keeping with the reality of God. Righteousness is a breastplate. When you are accused, you need to be sure of forgiveness and status as a free child of God.
Shoes (sandals, well think boots) are Good News – that travels well. Faith is a shield; you don’t know or understand everything – but trust that God does. Salvation is helmet, protecting the brain that matters, even if other bits suffer. Prayer reminds you to work with God always – individual enterprise is dangerous!
There is only one weapon (despite many pieces for protection) – the word of God as sword. Not hard and cutting words, but the ones God gives which go straight to the heart of the matter.
That, says Paul in prison, is your equipment. Learn to use it, practice and get comfortable with every bit before you go into a serious fight.
Perhaps you still don’t like the thought? You wanted a quiet life, not a punch up? Will you end up with the Jews in Capernaum Jesus asked “Does this make you want to give up?” (John 6:61). Or are you with Joshua and his family (in Joshua 24), deciding to be with God and rejecting the alternatives.
This military metaphor is – only a metaphor (the weapons are differently allocated to spiritual qualities in other places). But it is also a reality to be faced while there is time for reflection.