Who is “The (Arch)angel of the Lord”?

There are few Hebrew texts on the Archangel Michael which date from before or at the time of the completion of the inspired Books of the Old Testament.   Yet, "the Angel of the Lord" also in the Pentateuch; and "Michael" in Daniel 10:13 & 10:21 & 12:1; and "The Angel of the Covenant" in Malachi 3:1 cf. 4:2f from around B.C. 400 — do indeed all seem to be expressions teaching manifestations of God Himself.

The A.D. 165 Ante-Nicene Church Father Justin Martyr in his Dialogue with Trypho (62) declared: "This Offspring…was with the Father before all the creatures….   The Scripture by Solomon has made clear that He Whom Solomon calls ‘Wisdom’ was begotten…before all His creatures….   He was also declared this same thing…by Joshua (5:13-15)."