Could it be true that Yahushua, the Messiah, existed before he became a fleshly man living on the earth?

Consider this intriguing question: Who was the divine entity that spoke to Moses and declared:

I am the eloahi of your fathers, the eloahi of Abraham, the eloahi of Isaak, and the eloahi of Jacob. (Exodus 3:6)

In Exodus 3:7