Jesus Christ is the same yesterday, today, and forever. (Hebrews 13:08, NKJV).
There is no ground quite as useless as shifting sand. This is true in geology, and is metaphorically true in all spheres of human experience. Consistency, solidity, and stability - not whimsy - are the requirements needed in the realms of life and death, morality, ethics, and religion.
Mere mortals cannot achieve this goal, only Deity can. If we were to base anything of substance on vaporous human opinion alone, we would stumble through life as the blind leading the blind. Our views of right and wrong, the sanctity of life, the value of marriage and family, and the dignity inherent in being human would be blown about with the wind of culture and popular opinion. These would be as changeable and uncertain as shifting sand.
When you remove the omnipotent, omniscient, and omnipresent Being from the equation, all that is left is the miserable imagination and intellect of fallen and depraved man. The inevitable result is chaos and anarchy, the deadly slime upon which evil thrives.
Increasingly, as “modern” civilization departs from God, we see this very thing. When you decry the Standards-Maker as obsolete, standards themselves become pillars of reed in the sand. Nothing of value can be counted upon to survive the next gale of plebeian thinking and Christ-denying rebellion.
That is why the short verse above is so vitally important to understanding the nature of our Lord and Savior, Jesus Christ. This text, and others like it, affirm and establish the unequivocal deity and eternality of the One we serve.
It is logically impossible to accept the mistaken concept that Jesus was other than God in the flesh. If you accept Him at all, and understand the things He said and what was written about Him, you MUST conclude what perhaps C.S. Lewis said best:
“I am trying here to prevent anyone saying the really foolish thing that people often say about Him: I’m ready to accept Jesus as a great moral teacher, but I don’t accept his claim to be God. That is the one thing we must not say. A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. He would either be a lunatic — on the level with the man who says he is a poached egg — or else he would be the Devil of Hell. You must make your choice. Either this man was, and is, the Son of God, or else a madman or something worse. You can shut him up for a fool, you can spit at him and kill him as a demon or you can fall at his feet and call him Lord and God, but let us not come with any patronizing nonsense about his being a great human teacher. He has not left that open to us. He did not intend to.”
Now, at least on the surface, it does not necessarily follow that eternality equates to immutability. Other religions speak of the “whimsy of Allah”, or the “unknowability of God”, but if you look only a little closer you will see that for God to be God - infinite, and all-knowing - He must be immutable, unchanging. You must see, even further, that “change” from that perspective is antithetical to omniscience. Why would He alter an opinion, or action, or plan? Did He not foresee all the contingencies in the first place? Did His perception change?
Granted, the Bible speaks of God's interaction with Creation in anthropomorphic terms, “He regretted that He made man...”, “He turned against them...”, etc., but that is only an accommodation for human understanding; a way to describe the flow of events that, for God to be God, He must have foreknown before the foundation of existence.
What this means for us is simply this: the fact that Jesus is unchanging is surety that all His promises and warnings are true; that He is faithful; that He will complete that good work that He has begun in us; that He holds all of Causality in His hands and will fulfill all that He has purposed and planned... for us.
It also means that the doctrine laid out in the New Testament, inspired by His Spirit, is unalterable. His precepts and truths do NOT evolve, they are established in Heaven, and nothing and no one can change what has been written.
So, man's only escape from eternal judgement is by forgiveness through faith in Him. We are immortal whether we like it or not. There is no way into Heaven except through Him. We are saved not by works but by grace through faith. We cannot please God without faith. All our righteousness is as filthy rags. In Him is all fullness of joy forever. He always lives to make intercession for us. In short:
...He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him. (2 Corinthians 5:21, NKJV).
Instead of arrogantly denying the relevance of Christianity as old-fashioned, we should glory in its stability, consistency and immutability. For upon that rests our entire eternity. There MUST be some things which cannot change in order for things to be at all.
While His unthinkable judgment against sin is unchanging, so too is His immeasurable forgiveness through faith.
Without Christ as our rock, we could not rest, for without Him we are forever on the shifting sands of our own powerlessness.