You are talking about the incarnation. Lord Jesus is there in the beginning. He existed prior to the incarnation. Do you read the Old Testament. He talked with Abraham.
Gen. 18:And the Lord appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day;
2 And he lift up his eyes and looked, and, lo, three men stood by him: and when he saw them, he ran to meet them from the tent door, and bowed himself toward the ground,
3 And said, My Lord, if now I have found favour in thy sight, pass not away, I pray thee, from thy servant:
Gen. 18:13 And the Lord said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?
Gen. 18:20 And the Lord said, Because the cry of Sodom and Gomorrah is great, and because their sin is very grievous;
21 I will go down now, and see whether they have done altogether according to the cry of it, which is come unto me; and if not, I will know.
22 And the men turned their faces from thence, and went toward Sodom: but Abraham stood yet before the Lord.