Seeing God: Exodus 24

Since our physical eyes are probably unable to "see" God in this earthly realm, what did Aaron, his sons, and the seventy elders see in Exodus 24:10-11? Who is "the brightness of His glory, and the express image of His Person"?
Support this ministry: https://www.paypal.com/paypalme/dwkrienke
http://www.davidkrienkemusic.com/