Not in a visible shape, which was utterly denied, Deuteronomy 4:12,15; but personally and immediately, not by the mouth or ministry of Moses; plainly and certainly, as when two men talk face to face; freely and familiarly, so as not to overwhelm and confound you. Compare Exodus 33:11 Numbers 12:8.
Related Commentaries of Deuteronomy 5:4
Deuteronomy 5:4
4 The LORD talked with you face to face in the mount out of the midst of the fire,