See now; learn now by your own sad experience what vain and impotent things idols are, and what a silly thing it was in you to put your trust in them, as they did Deuteronomy 32:37. I am he, i.e. the only true, and omnipotent, and irresistible God, as it here follows.
Related Commentaries of Deuteronomy 32:39
Deuteronomy 32:39
39 See now that I, even I, am he, and there is no god with me: I kill, and I make alive; I wound, and I heal: neither is there any that can deliver out of my hand.