Set your hearts unto all the words - Another proof that all these awful denunciations of Divine wrath, though delivered in an absolute form, were only declaratory of what God would do If they rebelled against him.
Albert Barnes
Notes on the Whole Bible
Verses 44-52
These verses were, no doubt, added by the author of the supplement to Deuteronomy. For the statements contained in them, consult the marginal references.
Matthew Henry
Concise Bible Commentary
Here is the solemn delivery of this song to Israel, with a charge to mind all the good words Moses had said unto them. It is not a trifle, but a matter of life and death: mind it, and you are made for ever; neglect it, and you are for ever undone. Oh that men were fully persuaded that religion is their life, even the life of their souls!
SDA Bible Commentary (limited)
Volume 1-7
46. Set your hearts. Compare God’s exhortation to Ezekiel (Eze. 40:4).
Your children. This instruction concerning the training of the children had already been given a number of times (see chs.4:10; 6:7; 11:19).