The coming of the Messianic kingdom means the restoration of creation. The sign of this restoration is that "the mountains shall drip sweet wine" (Amos 9:11-15). When the elements of a fallen creation fail and run short at a wedding feast, our Lord Jesus steps in to restore creation and miraculously changes water into an abundance of the very best wine (John 2:1-11). With this sign, Christ manifests His glory.
The "back" of God (Ex. 33:12-23) is revealed to those who believe.