Interesting story, the way I’ve looked at this story is that it’s an allegorie, that paints a picture of some one turning back from the true focus of out faith which should be the cross. For example Jeroboam was offering up incense on the alter at Bethel, he should have been offering up a sacrifice at Solomons temple in Judea, which in the old testament was a picture of the cross to come. The man of God was instructed to correct him, then leave by a different way, this shows in God we can only go forward in our faith, not turn back in any way, or turn to a different way. When the false prophet found the man of God, he was sitting under the oak tree, this is the position we should always be in, as the oak tree represents the cross, so we should live our life in the shadow of the cross, however the old prophet comes to the man of God and tells him to go back to his place. I see two problems here, one is he is going back to an old doctrine that does not anchor their faith in the cross, it could be a doctrine of works, and second one is he is eating and drinking from the old way of teaching before he learnt the “message of the cross” which is the terminology the apostle Paul called it in 1 Corinthians 1:18. To summarize, its simply going back to old teachings that do not teach the true meaning of Pauls gospel in what Paul called “ the message of the cross”. its that our salvation and sanctification come only through anchoring our faith in the finished work of the cross!!!! and not on any works of the flesh...........