Jesus Was/Is the God Men Had Seen Before His Incarnation

John 1:18 No man hath seen God at any time, the only begotten Son, which is in the bosom of the Father, he hath declared him.

John 6:46 Not that any man hath seen the Father, save he which is of God, he hath seen the Father.

Scripture establishes that men have not seen God the Father at any time, but men have seen God in the Old Testament, and that God that the men have seen was Jesus Christ as the Son of God BEFORE His incarnation. Jesus verified that Moses wrote about Him.

John 5:39 Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me. 40 And ye will not come to me, that ye might have life...… 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?

By His own words, Jesus said that Abraham had seen Him.

John 8:56 Your father Abraham rejoiced to see my day: and he saw it, and was glad. 57 Then said the Jews unto him, Thou art not yet fifty years old, and hast thou seen Abraham? 58 Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am. 59 Then took they up stones to cast at him: but Jesus hid himself, and went out of the temple, going through the midst of them, and so passed by.

Jesus was referencing these moments with Abraham.

Genesis 12:7And the Lord appeared unto Abram, and said, Unto thy seed will I give this land: and there builded he an altar unto the Lord, who appeared unto him.

Genesis 17:1And when Abram was ninety years old and nine, the Lord appeared to Abram, and said unto him, I am the Almighty God; walk before me, and be thou perfect.

Genesis 18:1And the Lord appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day;

The last reference in Genesis 18th chapter was when the Lord promised Abraham that Sarah will have a son.

Other men have seen the Lord also. The Lord appeared to Isaac.

Genesis 26:1And there was a famine in the land, beside the first famine that was in the days of Abraham. And Isaac went unto Abimelech king of the Philistines unto Gerar. 2 And the Lord appeared unto him, and said, Go not down into Egypt; dwell in the land which I shall tell thee of:

The Lord appeared to Jacob.

Genesis 32:24 And Jacob was left alone; and there wrestled a man with him until the breaking of the day. 25 And when he saw that he prevailed not against him, he touched the hollow of his thigh; and the hollow of Jacob's thigh was out of joint, as he wrestled with him. 26 And he said, Let me go, for the day breaketh. And he said, I will not let thee go, except thou bless me. 27 And he said unto him, What is thy name? And he said, Jacob. 28 And he said, Thy name shall be called no more Jacob, but Israel: for as a prince hast thou power with God and with men, and hast prevailed. 29 And Jacob asked him, and said, Tell me, I pray thee, thy name. And he said, Wherefore is it that thou dost ask after my name? And he blessed him there. 30 And Jacob called the name of the place Peniel: for I have seen God face to face, and my life is preserved.

So it was Jesus as the God of Abraham, Isaac, and Jacob that appeared unto Moses in that fiery bush.

Exodus 3:2 And the angel of the Lord appeared unto him in a flame of fire out of the midst of a bush: and he looked, and, behold, the bush burned with fire, and the bush was not consumed. 3 And Moses said, I will now turn aside, and see this great sight, why the bush is not burnt. 4 And when the Lord saw that he turned aside to see, God called unto him out of the midst of the bush, and said, Moses, Moses. And he said, Here am I. 5 And he said, Draw not nigh hither: put off thy shoes from off thy feet, for the place whereon thou standest is holy ground. 6 Moreover he said, I am the God of thy father, the God of Abraham, the God of Isaac, and the God of Jacob. And Moses hid his face; for he was afraid to look upon God.....

13 And Moses said unto God, Behold, when I come unto the children of Israel, and shall say unto them, The God of your fathers hath sent me unto you; and they shall say to me, What is his name? what shall I say unto them? 14 And God said unto Moses, I Am That I Am: and he said, Thus shalt thou say unto the children of Israel, I Am hath sent me unto you. 15 And God said moreover unto Moses, Thus shalt thou say unto the children of Israel, the Lord God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath sent me unto you: this is my name for ever, and this is my memorial unto all generations. 16 Go, and gather the elders of Israel together, and say unto them, The Lord God of your fathers, the God of Abraham, of Isaac, and of Jacob, appeared unto me, saying, I have surely visited you, and seen that which is done to you in Egypt:

The Son of God knew Moses was afraid to look upon God Himself and so it is reasonable as to why He appeared in the flaming bush as He'd appeared by the glory of the Lord in the clouds and other ways too.

So Moses had written of the Lord Jesus Christ just as Jesus has said before His incarnation as the "I am that I am" as the God of Abraham, Isaac, and Jacob.