He (Jesus) is the radiance of the glory of God and the exact imprint of his nature, and he upholds the universe by the word of his power. – Hebrews 1:3
The counsel of the Lord stands forever,
the plans of his heart to all generations. – Psalm 33:11
Of old you laid the foundation of the earth,
and the heavens are the work of your hands.
They will perish, but you will remain;
they will all wear out like a garment.
You will change them like a robe, and they will pass away,
but you are the same, and your years have no end. – Psalm 102:25-27
If God is not unchangeable, then we are undone. What if he changes a little and is not perfectly good? Could he sometime in the distant future become really bad? What if he changed regarding his promises? Could we have confidence regarding our salvation and a new heaven and new earth?
Since he holds all things together by the word of his power, if he is changeable, our scientists can rely on the “laws of nature” that rule all science. Remember, the “laws of nature” are simply the unwritten word of God that established all the natural laws at the moment of creation. If God’s word is not reliable, then all of creation is unreliable.
But what if God changed and got better? Then we would have to acknowledge that the God that we trusted in the past wasn’t a wholly good God. Again, he would no longer be trustworthy.
Does this cause you to see the foolishness of believing in a world with no creator, a world that just exists? Assuming that the laws of nature will stay steady would be folly. Why would they? It only makes sense if there is an unchangeable God who holds them in place. The alternative is pantheism and assuming that everything is God. Even that can only logically tend to chaos.
I often take basic wonderful theological truths for granted. Just taking the time to think about the implications of the unchangeableness of God brings gratitude to my heart. These simple truths like God is the creator, God is sustainer, God is unchangeable, are wonderful truths on which we rely daily. Because of these truths, my camera will work, and I can take beautiful pictures. Because of these truths, my car will start and run, and I can get to the store and back. Simple things for which to be thankful.
I encourage you to acknowledge him in these truths and give him thanks. Thank you for being unchangeable, reliable, trustworthy and awesome!