The Torah says Moses saw God's "back" but not His face. Targum Pseudo-Jonathan, the Aramaic paraphrase of the Torah, explains what that backward glimpse actually revealed.
"I will make the host of angels who stand and minister before Me to pass by, and you shall see the qitra di-tefillin d'yeqar Shekhinti, the handborder of the tefillin of My glorious Shekhinah; but the face of the glory of My Shekhinah you cannot be able to see" (Exodus 33:23).
Two astonishing images. First, the "back" of God is translated as a host of angels passing in procession. Moses saw the ministering angels, not God Himself. The angelic throng was what crossed his vision.
Second, and this is the Targum's most famous mystical leap, Moses saw the knot of God's tefillin. The Talmud (Berakhot 7a) develops this image further - God wears tefillin, and inside those tefillin is not the verse about Israel's oneness but a verse about Israel's chosenness: "Who is like Your people Israel?" The knot, the qesher, is the clasp at the back of God's head, and this Moses was allowed to glimpse.
The face is too much. The angels and the tefillin knot are already more than any prophet before or since has been granted. The greatest vision in the Torah is still a vision of the back, the procession, the knot.
Takeaway: We do not see God's face in this world. We see the knot at the back of the Shekhinah's tefillin - evidence that we are bound to the One who binds Himself to us.