In Deuteronomy 6:25, at the end of a major thematic statement about the nature of the Law and Israel’s obligations towards God, Moses declares,
If we are careful to obey all this law before YHWH our God, as he has commanded us, that will be our righteousness.
What is the nature of the guarantee Moses asserts here? What does righteousness mean here and what does it mean for this to follow from careful obedience? These questions reach to the heart of the nature of the Old Covenant, and the relation of Jesus to it.
In particular, we need to ask: does righteousness have the same meaning here as it does in Paul’s theology? That is, is righteousness about being “in the right” with God, and so “saved” (I am aware that this is assuming much, but I don’t see a way around a basic meaning of something like this).
Some tricky implications follow if we say yes. Most glaringly, we have to ask how the apostle Paul can say that “by observing the law no one will be justified” (Galatians 2:16; Romans 3:20)?
As far as I can tell, we have two options at this point. (1) First, we could say that the guarantee in Deuteronomy 6:25 was a real one, but never realised. That is, obedience to the law genuinely did lead to righteousness, but, as Paul points out, no one ever achieved it. This, however, leads us to a real dilemma when we consider another key factor in this discussion: Old Covenant characters in the Bible who are described as “righteous”. There are several such characters, but Zechariah and Elizabeth are particularly stark examples: “both of them were righteous in the sight of God, observing all the Lord’s commands and decrees blamelessly” (Luke 1:6). What do we do with this?
(2) Alternatively, we could say that when Paul said “by observing the law” he meant something different to what Moses meant when he said “if we are careful to obey all this law”. This may seem silly at face value, but it’s possible: Paul seems to emphasise the idea of reliance on the law (e.g. Romans 2:17; cf. Galatians 3:10). Is relying on the law what Moses was talking about? On this reading, Moses’ promise was real and Old Covenant saints like Zechariah and Elizabeth are examples of what it meant: they were truly righteous through obedience to the law. But, can we really say that “relying on the law” is not what Moses was talking about? And, where does this interpretation lead us to in terms of justification? Are we saying they were justified by works?
(3) The alternative to all of this, of course, is to say that no, actually, when Moses said “righteous” he meant something different to what Paul meant by “righteous”. Moses wasn’t talking about salvation or anything, he was talking about something a bit smaller — covenant responsibilities, perhaps. Saying this avoids a lot of the complications we’ve seen above. It would lead to the view that the Old Covenant saints have this righteousness, but that this was not righteousness in the sense Paul was interested in. However, this simplicity comes at a major cost, namely, the consistency of Scriptural terminology across the whole Bible. Do we really want to say that when we read about righteousness in the Old Testament it means something fundamentally different to righteousness in the New Testament? Would the apostle Paul have believed this?
I’m not sure what I think the answer to this one is. I’m not at all happy with option (3), though I know people who are. I’m also not happy with (1) because of what it implies about the law and because of the inconsistency with descriptions of people in the Bible. Though I’m also unclear about (2), I think overall it has the best potential. After all, what did being careful to obey the law look like according to Moses? At least in part it meant to “love the Lord your God with all your heart and with all your soul and with all your strength” (Deuteronomy 6:5). This was pretty important for Jesus, too. And I don’t find it too hard to believe that this was not, actually, what Paul was talking about when he said that no one will be justified by deeds prescribed by the law. I wonder if, for Moses, “being careful to obey” the law was not at all a matter of relying on the law?
Hmmmm…