“Gather to Me” – this is what the verse said: “Who builds His upper chambers in the heavens and established His group [agudato] on earth” (Amos 9:6). To what is the matter comparable? It is to a palace that was built upon ships. As long as the ships are tethered, the palace that is upon them stands, so is: “Who builds His upper chambers in the heavens.”
His Throne of Glory, as it were, is solidly established on High when Israel forms an organic group. That is why it is stated: “Who builds His upper chambers in the heavens” – when? It is when “and established His group [agudato] on earth.” Likewise it says: “He became king in Yeshurun [when the leaders of the nation assemble]” (Deuteronomy 33:5).
That is why the Holy One blessed be He said to Moses: “Gather to Me.” Why? It is because the assembly of the righteous is a benefit for them and a benefit for the world. But the assembly of the wicked is a calamity for them and a calamity for the world.