Two huge yesodos that emerge from this shiur -
1] At קריעת ים Hashem was מבטל one of the 10 מאמרות which He didn't do during the 10 makkos.
2] Kedusha must have "ממשות" - concrete form. Thus, the Kedusha of the air of Eretz Yisrael comes from the ground. The Kedusha of Yom Tov comes from Shabbos which derives its Kedusha from the יום שכולו שבת when time will have ממשות.
