New Defender's Study Bible Notes
12:22 mount Sion. In contrast to the frightening scene at Sinai is the wonderful glimpse of the heavenly Zion (Hebrews 12:22-24). This assemblage is now gathered in heaven, but will all become a glorious reality on earth when the “heavenly Jerusalem” descends out of heaven to the new earth (Revelation 21:2-7).
12:22 innumerable company of angels. Even though a third of God’s created angels followed Satan in his rebellion (Revelation 12:3,4), there still remains an innumerable host of heaven in the faithful angels, presumably associated with the innumerable starry hosts of heaven (Jeremiah 33:22).