During the next six days, G‑d had the Jewish people prepare for the Revelation of the Giving of the Torah. On the morning of the 6th of Sivan, G‑d began to reveal Himself on Mount Sinai.
The Power of Enthusiasm
וְהַר סִינַי עָשַׁן כֻּלּוֹ מִפְּנֵי אֲשֶׁר יָרַד עָלָיו ה' בָּאֵשׁ וגו': (שמות יט:יח)
The whole of Mount Sinai was asmoke because G‑d had descended upon it in fire. Exodus 19:18

The fact that the mountain was asmoke indicated that the Giving of the Torah enabled the physical world to be affected by spirituality. This teaches us that the key to transforming all aspects of life – space, time, and consciousness – is making sure that all aspects of our religious life are imbued with “fire,” i.e., warmth and enthusiasm for G‑d and His Torah.1