The writer of Hebrews, telling us what God had prophesied about Jesus, writes, “But to the Son He says: ‘Your throne, O God, is forever and ever’” (Heb. 1:8). He also identifies Jesus as the Jehovah-Elohim of Psalm 102:25-27, who existed eternally before He created the heavens and earth (cf. Heb. 1:10) and remains eternally the same (cf. Heb. 1:11-12), “yesterday, today, and forever.” in the person of Jesus of Nazareth (Heb. 13:8). To see in this last verse only a reference to the faithfulness of Jesus and not a reference to His immutability, as some do, is a serious mistake. In truth, Jesus Christ’s faithfulness is grounded in His changelessness. Because He does not change ontologically (i.e., because He has always been the fullness of God that He is at this very moment), He has been, is and always will be completely and totally reliable (i.e., “faithful”). It is only in this sense that Jesus could identify Himself as the “I AM THAT I AM” or “He who is” of Exodus 3:14 (see also Jn. 8:58). When Jesus said, “Most assuredly, I say to you, before Abraham was, I AM,” He used the aorist tense to describe Abraham’s existence but the timeless present tense to describe His own existence and, thus, identified Himself as the self-existent, eternal, infinite, immutable God with a capital “G.” Well has it been said:
Lord, You have been our dwelling place in all generations. Before the mountains were brought forth, or ever You had formed the earth and the world, even from everlasting to everlasting, You are God (Psa 90:1-2).
So, as difficult as it may be for finite creatures even to begin to comprehend, when the Divine Logos or Son of God became Immanuel and dwelt among us in the flesh (cf. Jn 1:14), or as the Bible says elsewhere, came in the likeness of man (cf. Phil 2:8), or was manifested in the flesh (cf. 1 Tim 3:16), He did not divest, give up, or have stripped from Him His Deity. In the person of Jesus dwelt, and continues to dwell (for such is the meaning of the present tense), all the fullness of the Godhead bodily as Colossians 2:9 so clearly points out. In fact, from a Biblical standpoint, the historical Jesus is never understood apart from His embodiment as the self-existent, eternal, infinite, immutable God in time and space—and if not, He could have never referred to Himself as “I AM THAT I AM,” the God who is, when everything is said and done, “totally other.”