From the beginning of the Torah until the end—I mean, from Bereshit until the end of Devarim—I was right. There is no parasha that starts off with a Vayakhel. This is it. This is the beautiful midrash (rabbinic interpretation). This is not something that is a once-in-a-lifetime item. The Torah is teaching us that, just as Moshe made kehillah—he made an assembly—so the midrash is telling us that in every generation, you should make big congregations of people and give the derashot (sermons) in public.
And what should you teach them? Teach them the laws of Shabbat. So, Moshe, I want the people to learn from you: to make big congregations of people every Shabbat and every Shabbat. An amazing thing. So we learned from Moshe Rabbeinu a big chiddush (novel insight): what he did was actually an instruction for the future generations. Every rabbi, every leader should take his congregation and bring them together on Shabbat and teach them the laws of Shabbat.
Incidentally, I saw some books bring down that when it says the laws of Shabbat, it doesn't necessarily mean the laws—do this, don't do this. It means the beauty of the Torah and the Shabbat, the depth. Basically, what we do is the derashot. And to enter the Beit Midrash (study hall). So we learn two things from this story. Number one, it's supposed to be on Shabbat. Number two, it should be with the kahal (congregation). And number three, it should be in the midrash. And then he says, “God Almighty, how is it? And when I see from heaven that the Jewish people are gathering on Shabbat, men and ladies.” Because the pasuk (verse) says, it was everybody. This wasn't only a men's event or a ladies' event. It was for everybody. I'm sure there was separate seating. I don't doubt that. This is orthodox operation. “And when I see that, my name is being praised amongst my children.”
From here, the rabbis learned that Moshe made an establishment: on every holiday or Shabbat, the rabbi should give a midrash regarding the day. It's not only on Shabbat, but on holidays as well. So this, to me, is a very, very important midrash. It's telling us what Shabbat is supposed to look like.