From a truly great book on spirituality, Sensing Your Hidden Presence:
As long as the battle of life continues, it is impossible to look upon the Lord face to face. It is only possible to get a glimpse of Him fro the fleeting traces, moving from the effects to the Cause, walking along the path of deductions and analogies, in shadows, indirectly; in short, "from behind."
"Then I wll take my hand away and you will see my back; by my face will not be seen," (Ex. 22:23).