King James Version

What Does Deuteronomy 31:21 Mean?

“And it shall come to pass, when many evils and troubles are befallen them, that this song shall testify against them as a witness; for it shall not be forgotten out of the mouths of their seed: for I know their imagination which they go about, even now, before I have brought them into the land which I sware. against: Heb. before go: Heb. do”

Context

Now therefore write ye this song for you, and teach it the children of Israel: put it in their mouths, that this song may be a witness for me against the children of Israel.

For when I shall have brought them into the land which I sware unto their fathers, that floweth with milk and honey; and they shall have eaten and filled themselves, and waxen fat; then will they turn unto other gods, and serve them, and provoke me, and break my covenant.

And it shall come to pass, when many evils and troubles are befallen them, that this song shall testify against them as a witness; for it shall not be forgotten out of the mouths of their seed: for I know their imagination which they go about, even now, before I have brought them into the land which I sware. against: Heb. before go: Heb. do

Moses therefore wrote this song the same day, and taught it the children of Israel.

And he gave Joshua the son of Nun a charge, and said, Be strong and of a good courage: for thou shalt bring the children of Israel into the land which I sware unto them: and I will be with thee.

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Commentary

Ellicott’s Commentary for English Readers

(21) **This song . . . shall not be forgotten out of the mouths of their seed.**—And it is not forgotten now. St. Paul made special use of it in the last days of the second Temple. This song is a favourite piece of Hebrew poetry to this day. Rashi observes: “This is a promise to Israel that the law shall not be utterly forgotten by their seed.” **I know their imagination.**—Heb., *yêtzer, *the same word employed in Genesis 6:5; Genesis 8:21. It is the word commonly used in Rabbinical literature for the evil nature or good nature in any man. *The nature which they are forming, or making, this day, *would be a literal rendering of the sentence in this verse. And yet with all this, He made Balaam say, “He hath not beheld iniquity in Jacob nor seen perverseness in Israel” (Numbers 23:21). Comp. 1Chronicles 28:9, “The Lord . . . understandeth all the *imaginations *of the thoughts,” and Psalm 103:14, “He knoweth our *frame *(*yêtzer*)*; *He remembereth that we are dust.”

Charles John Ellicott (1819–1905). Public Domain.

Historical Context

This verse is found in the book of Deuteronomy. Understanding the historical and cultural background helps illuminate its meaning for the original audience and for us today.

Theological Significance

Deuteronomy 31:21 contributes to our understanding of God's character and His relationship with humanity. Consider how this verse connects to the broader themes of Scripture.