For G‑d your G‑d… is a consuming fire (9:3)

Between coldness and heresy stands an extremely thin wall. It is written: "For G‑d your G‑d is a consuming fire" - G‑dliness is a blazing flame. Torah study and prayer require a flaming heart, so that "all my bones should proclaim" the words of G‑d.1

- Rabbi Sholom DovBer of Lubavitch

Rabbi Nechemia of Dubrovna told:

I once saw a Russian soldier being whipped. His crime? While standing watch on a winter night, his feet had frozen in their boots. "Had you remembered the oath you took to serve the czar," his commander berated him, "the memory would have kept you warm."

"For 25 years," concluded Reb Nechemia, "this incident inspired my service of the Almighty."