Mount Sinai was given the preference not for its humility alone, but also because upon it there had been no worshipping of idols; whereas the other mountains, owing to their height, had been employed as sanctuaries by the idolaters. Mount Sinai has a further significance, too, for it had been originally a part of Mount Moriah, on which Isaac was to have been sacrificed; but Sinai separated itself from it, and came to the desert.
Then God said: "Because their father Isaac lay upon this mountain, bound as a sacrifice, it is fitting that upon it his children receive the Torah." Hence God now chose this mountain for a brief stay during the revelation, for after the Torah had been bestowed, He withdrew again to heaven. In the future world, Sinai will return to its original place, Mount Moriah, when "the mountain of the Lord's house shall be established in the top of the mountains, and shall be exalted above the hills."