“And it shall come to pass, while My glory passeth by, that I will put thee in a clift of the rock, and will cover thee with My hand while I pass by: and I will take away Mine hand, and thou shalt see My back parts: but My face shall not be seen.”
The “back parts” of God are seen by those who follow Him, and in so doing, they abide in His Life.
The face of God is seen by those who turn against Him, and in so doing, they abide in death.
If no man who sees the face of God shall live, then no man shall live unless they follow Him. For there is only following Him or turning against Him: there is only Life or death.
The measure of the glory of God that we are privileged to see is only uncovered as we follow Him, and is proportionate to our devotion.