So one needs faith in God, OR a faith in some other metaphysic, to sustain nature. God as Governor Scripture and ancient sages teach us to view God as tamer of disorder, as creator, and as sustainer. By analogy one can view God as the agent that governs the Laws of Nature. I have already argued that these Laws don't just chug along by themselves. I suspect that not everyone before me is prepared to swallow this idea whole.
Science is nothing but a collection of human constructs.
The Morse Code is an excellent example of a human construct. It is an invention. On the other hand, the DNA code, in which the codon CUG instructs the formation of the amino acid leucine in the cells of all living organisms, is not a human invention, it is a discovery. Newton did not invent the laws that govern the elliptical motion of Saturn around the Sun. The laws of quantum mechanics do not govern individual quantum events, which are dependent upon a human observer.