3. They had wretchedly degenerated from what they were when God first formed them into a people (v. 21). I had planted thee a noble vine. The constitution of their government both in church and state was excellent, their laws were righteous, and all the ordinances instructive and very significant; and a generation of good men there was among them when they first settled in Canaan. Israel served the Lord, and kept close to him all the days of Joshua, and the elders that out-lived Joshua, Josh. xxiv. 31. They were then wholly a right seed, likely to replenish the vineyard they were planted in with choice vines. But it proved otherwise; they very next generation knew not the Lord, nor the works which he had done (Judg. ii. 10), and so they were worse and worse till they became the degenerate plants of a strange vine. They were now the reverse of what they were at first. Their constitution was quite broken, and there was nothing in them of that good which one might have expected from a people so happily formed, nothing of the purity and piety of their ancestors. Their vine is as the vine of Sodom, Deut. xxxii. 32. This may fitly be applied to the nature of man; it was planted by its great author a noble vine, a right seed (God made man upright); but it is so universally corrupt that it has become the degenerate plant of a strange vine, that bears gall and wormwood, and it is so to God, it is highly distasteful and offensive to him.