For clarification, taking Moses out of the equation, we will see that the law of God was, and is spoken by His only begotten Son Jesus Christ. So whatever we understand and believe that is the “law of Christ”, is also identical to the “law of God.”
God instructs Israel to listen to the Angel that has the name of God in Him. Anyone who refuses to listen to His voice is guilty without pardon. He goes before Israel to conquer the adversary. He comes to Jerusalem to save. He made heaven and earth. We give thanks to the Father because of Him. He claims that He comes to us in the name of the Father. The words of God come forth from His mouth. Our help is in His name.
Many will want to add the difference between the old and new covenants in relation to the law that is also different between the two. But in relationship the only difference is the physical versus the spiritual. Now without the physical that came first, there would ultimately be nothing left to compare the relationship spiritually as Jesus taught in parables. Matthew 13:13
Exodus 23:20-23
20 Behold, I send an Angel before thee, to keep thee in the way, and to bring thee into the place which I have prepared.
21 Beware of him, and obey his voice, provoke him not; for he will not pardon your transgressions: for my name is in him.
22 But if thou shalt indeed obey his voice, and do all that I speak; then I will be an enemy unto thine enemies , and an adversary unto thine adversaries.
23 For mine Angel shall go before thee, and bring thee in unto the Amorites, and the Hittites, and the Perizzites, and the Canaanites, the Hivites, and the Jebusites: and I will cut them off.
Note. obey his voice, and do all that I speak (this is the connection)
Matthew 21:9 And the multitudes that went before , and that followed , cried , saying , Hosanna to the Son of David: Blessed is he that cometh in the name of the Lord; Hosanna in the highest.
Exodus 32:34 Therefore now go, lead the people unto the place of which I have spoken unto thee: behold, mine Angel shall go before thee: nevertheless in the day when I visit I will visit their sin upon them.
Psalm 124:8 Our help is in the name of the LORD, who *made heaven and earth.
Colossians 1:12-17
12 Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light:
13 Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
14 In whom we have redemption through his blood, even the forgiveness of sins:
15 Who is the image of the invisible God, the firstborn of every creature:
16 *For by him were all things created , that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
17 And he is before all things, and by him all things consist .
John 5:43-47
43 I am come in my Father's name, and ye receive me not: if another shall come in his own name, him ye will receive .
44 How can ye believe , which receive honour one of another , and seek not the honour that cometh from God only?
45 Do not think that I will accuse you to the Father: there is one that accuseth you, even Moses, in whom ye trust.
46 For had ye believed Moses, ye would have believed me: for he wrote of me.
47 But if ye believe not his writings, how shall ye believe my words?
Deuteronomy 7:1
When the LORD thy God shall bring thee into the land whither thou goest to possess it, and hath cast out many nations before thee, the Hittites, and the Girgashites, (a tribe of the Canaanites descendant of Ham and his offspring Canaan see Genesis 10:16) and the Amorites, and the Canaanites, and the Perizzites, and the Hivites, and the Jebusites, seven nations greater and mightier than thou;
Deuteronomy 18:15-19
15 The LORD thy God will raise up unto thee a Prophet from the midst of thee, of thy brethren, like unto me; unto him ye shall hearken;
16 According to all that thou desiredst of the LORD thy God in Horeb in the day of the assembly, saying, Let me not hear again the voice of the LORD my God, neither let me see this great fire any more, that I die not.
17 And the LORD said unto me, They have well spoken that which they have spoken .
18I will raise them up a Prophet from among their brethren, like unto thee, and will put my words in his mouth; and he shall speak unto them all that I shall command him.
19 And it shall come to pass, ***that whosoever will not hearken unto my words which he shall speak in my name, I will require it of him.
John 8:28 Then said Jesus unto them, When ye have lifted up the Son of man, then shall ye know that I am he, and that I do nothing of myself; but as my Father hath taught me, I speak these things.
It has been this way from the beginning, and there can be no separation from what has been proven by the name/Word of God the Father in heaven, for “In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God.” John 1:1-2