The Lord my Great Lord.
God is the Master and majestic Lord. God is our authority.
Psalms 8 Isaiah 40:3-5 Ezekiel 16:8 Habakkuk 3:19.
Adonai is the plural of Adon. This term is the verbal parallel to Yahweh, Jehovah and YHWH (which was considered too holy to be pronounced). The word "Adonai" is not a proper noun nor is it directly a name of God. It is an emphatic form of the word "Adon" which means "lord" or "master". That is an statement of someone who is above everyone else, the one who is superior, that is why its common use is THE LORD.
Jesus is the last messenger of God.
In the Old and New Testament, messenger and angel are used indistinctly. Christ is the last messenger of the New Covenant and the commander of the heavenly hosts.
The angel of the Lord (Exodus 3:2; Judges 13:15-18) the commander of the army of the Lord (Joshua 5:14).
In the beginning was the Word, and the Word was with God, and the Word was God ( John 1:1).