Can you imagine what the world would be like if God was fickle and erratic?
The natural laws would then be variable, and unstable, depending upon God's mood!
The force of gravity could be extreme one day, making it difficult to move about, then insignificant on another day, making it impossible to keep things down in the same position.
Our coffee could float out of it's mug. It would be chaotic.
Paul tells us that: "..in Christ all things hold together."
I believe that all the molecular structures are held together by Christ's unchangeable power.
It is He who gives this creation it's stability.