We find regarding the beginning of The Word's existence, something further described in Hebrews chapter 7. Speaking of Melchisedec, who was king of Jerusalem in the days of Abraham, it says also that he was the Priest of God Most High. This Melchisedec had existed from eternity—"without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually" (Hebrews 7:3).
Since Melchisedec was "like unto the Son of God," and abides as High Priest forever continually, and Jesus Christ is now High Priest, Melchisedec and Jesus Christ are one and the same Person.
Therefore Christ was "without father, without mother, without descent [in Abraham's time], having neither beginning of days, nor end of life." God also had existed eternally with the Word. Jesus, when he was "the Word," was an immortal being who had existed always—there never was a time when he did not exist—without beginning of days. He was, then, "like" the Son of God—but he was not yet the Son of God. He also was God, along with God.
These passages show that the Word, in the beginning—before anything had been created—was with God, and he, also, was God. Now how could that be?
There might be a man named John. And John might be with the man named Smith, and John might also be Smith because John is the son of Smith, and Smith is the family name. Yet they are two separate persons.
The only point of difference in that analogy is that the Word, at the time of John 1:1, was not, yet, the Son of God. But he was with God, and he also was God.
They were not yet Father and Son—but they were the God Kingdom!
Herbert W. Armstrong (1892-1986)
Fully Man and Fully God? (2001)