Deuteronomy 32:46

Ver. 46. And he said unto them, Set your hearts unto all the words— Having concluded his prophetical ode, Moses addresses himself anew to the Israelites in a pathetic exhortation, to weigh and remember well the contents of that divine speech, and to improve it by carefully and sincerely observing the laws which he had given them, and training up their children in a habit of the same obedience; assuring them, that this was not a vain thing for them; ver. 47 that they would not employ their diligence in an unprofitable matter; for this reason, because, it would be their life; i.e. the way to make them a wise and happy people. Much higher is the life whereof our Saviour speaks, when he says, this is life eternal; to know thee, the only true God, &c. John 17:3.