Or HaChaim on Deuteronomy 32:39/אור החיים על דברים ל״ב:ל״ט

1 ראו עתה כי אני אני הוא, "See, now, that I, I am He." Moses repeats the word אני twice, once each vis-a-vis the two kinds of idolators we have just described. The word אני, emphasises "I and no one else" when applied to the first kind of idolator, whereas it means "I alone," when applied to the second kind of idolator. He continues: ואין אלוהים עמדי, "and there is no other deity with Me," that there are no intermediaries between G'd and His creatures.

2אני אמית ואחיה, "It is I who kill and who bring to life." This statement is addressed to the people who believe that there are two distinct forces at work in the universe, a benevolent one and a destructive one. The Torah goes on record that this is not so, but that all fateful decisions are exclusively G'd's domain. In order to emphasise that G'd intervenes even in what appear to be minutiae, G'd adds: "I strike down and I heal."

3ואין מידי מציל. "and there is no one who can rescue from My hand." This means that all creatures are mortal. In order to make this point clear G'd did not say ואין מציל מידי, but ואין מידי מציל.