Every Jew has no idea how much impact they have in Shamayim (heaven). He says that everything a Jew does—any Jew, everything they do—and everything that's happening in the world is because of what you do.
He says that when the Beit HaMikdash was destroyed by Titus and by Nebuchadnezzar, you think they destroyed the Beit HaMikdash? You think they have the power to destroy the Beit HaMikdash? No chance. But it's the Jew, the simple Jew who sins, who affects the Beit HaMikdash in heaven. And once they affect the Beit HaMikdash in heaven, that affects the Beit HaMikdash down here. They weaken it up there, and because of that, they weaken it down here. Then Nebuchadnezzar is able to penetrate the Beit HaMikdash. Then Titus is able to take the Beit HaMikdash down.
He says these are the words of the Mishnah: Da ma lema'ala mimcha. Know what is above you. What does it mean, “what is above you”? So we think it means there's Hashem. Know: Da ma lema'ala. Know what's happening above mimcha. From you. Because of you. Things are happening above from you. You say one extra comment; things are happening above. You say an extra chapter of Tehillim; things are happening above. Yes, from you. From average you. From simple you in your corner, with your simple income, with no fame, with kids who are simple kids, who are not valedictorians and not the worst kid in the class. You. Your little tefillah (prayer). Your little comment. You have no idea how powerful it is in Shamayim, and you know how much it affects Shamayim. And based on what it affects Shamayim, that's what impacts everything that happens in the world.
This is what it means that the Beit HaMikdash in heaven is equal to the Beit HaMikdash down here. What does it mean? What it means is that what happens up there, based on us, is what impacts what happens down here.