A lot of commentators analyze the actual armour, like the belt, shield or sword Paul is referring to, this, in my opinion, is a colossal waste of space and misses the entire purpose. What I want to do is talk about what Paul means by truth, righteousness and salvation. And these ideas do not come out of the Reformation (i.e. imputed righteousness) or the Greek/modern definition of truth, these ideas are found in Isaiah, and that is where we should look.
The the previous blog post I said that Isaiah is using Divine warrior language that comes from deep within Israel's history. In this blog I intend to give a very (very!) brief survey of the use of this language within the scope of the Old Testament, which will bring up points that will be important in later posts. But, in order to take a step forward we must first take a step or two back. Staying only in Isaiah will obviously not be helpful for our case because Isaiah is only a small part of a much larger tradition. We need to step back to take a look at the wider view, lest something is missed.
Posted by Adam at 23:28
Did you know that in Ephesians 6 Paul is citing portions of Isaiah when he talks about the "armour of God"? It's true. Now think about that for a second, what does that say about how that verse is to be interpreted? If Paul is using Old Testament passages he is doing it for a purpose and we should take that seriously. For Paul, Isaiah had something very important to say about living the Christian life, and we should listen too.
Posted by Adam at 23:27