And then down to verse 8 – ‘Beware lest any man spoil you.’ The spoils of battle.
In the Old Testament, yes, God used symbols and ceremonies because he was using pictures to teach about things unseen, but it was always made clear that these things had no efficacy at all; they were just visual aids. But the mistake the Jews made, or many of them at any rate, was to make these things actual modes of worship and attached efficacy and power to them. False teaching does the same today, as in the church of Rome for example where there is so much which is physical and symbolical.