And he said,
You can not see my face: for there shall no man see me, and live.
All Commentaries on Exodus 33:20 Go To Exodus 33
Augustine of Hippo
AD 430
Another point that can trouble us is how it was possible for the very substance of God to be seen by some while still in this life, in view of what was said to Moses: “No man can see my face and live,” unless it is possible for the human mind to be divinely rapt from this life to the angelic life, before it is freed from the flesh by our common death.