Face to face. Again he commends the Law by mentioning their certainty about it; for, when God openly manifested Himself, there could be no doubt of the author from whom it proceeded. To speak "face to face," is equivalent to discoursing openly and familiarly; and in point of fact God had spoken with them, as mortals and friends communicate with each other in their mutual dealings. Moreover, lest any doubt should still remain, God set before their eyes a visible manifestation of His glory, by appearing in the fire; for no other voice but that of God Himself could proceed out of fire. In the next verse a kind of explanation is added, when he says that he was the interpreter, who laid before them the commands he received from God. And thus he reconciles two things which seem at first sight to be contradictory, viz., that God spoke in person, and yet by a mediator; since they themselves having heard God's voice petitioned in their fear that He should not continue to speak in the same way. Hence it follows that they were convinced, by a sense of the divine glory and majesty, that it was not allowable for them to doubt the authority of the law. But I only slightly glance at this, because it has been more fully treated of before.

The LORD talked with you (b) face to face in the mount out of the midst of the fire,
(b) So plainly that you do not need to doubt it.

The Lord talked with you face to face in the mount,.... Meaning, not in that free, friendly, and familiar manner, in which he sometimes talked with Moses, of whom this phrase is used, Exodus 33:11, but publicly, audibly, clearly, and distinctly, or without the interposition of another; he did not speak to them by Moses, but to them themselves; he talked to them without a middle person between them, as Aben Ezra expresses it: without making use of one to relate to them what he said; but he talked to them directly, personally:
out of the midst of the fire; in which he descended, and with which the mountain was burning all the time he was speaking; which made it very awful and terrible, and pointed at the terrors of the legal dispensation.

The Lord talked with you face to face in the mount--not in a visible and corporeal form, of which there was no trace (Deuteronomy 4:12, Deuteronomy 4:15), but freely, familiarly, and in such a manner that no doubt could be entertained of His presence.

Face to face - 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.