Science has a reasonable understanding of matter and how the strong, the weak, and the electromagnetic forces and (at least for practical purposes) gravity affect it. We also have a firm grasp on an large array of other natural laws and principles.
But none of the forces or laws indicate that, from a human point of view, there is a constant evolution and change in our universe. They only describe change within so limited scopes that one cannot express connections between cause on the microscopic level and effect on the macroscopic level, or vice versa.
The laws of nature do not state anything about the development of life; although we do understand how DNA replicates, how organisms reproduce and mutate, how organisms adapt and survive according to changing environments, and how they in turn change their environments, we cannot explain which direction life will take. Neither do the laws of nature explain our emotions or reactions in spite of a good understanding of biochemistry, some neurological insight, etc.
Perhaps if in theory one could take a snapshot of the current state of my body and all things in its environment that have a non-negligible effect and, this snapshot now frozen in time and space, describe me as a defined system using mathematical equations and models of chemistry and physics. If our world could be modeled this way, and no random effects can occur, perhaps one could predict the direction of life.
But no man can handle this reductionist view, and must instead resort to mystical symbolism both to understand and to communicate any state of existence.
We possess an immense understanding of the world around and within us, yet our sense of development and life—our desire to act and live, to be and to become—is not covered by this understanding. We can still describe such feelings only in symbolic terms.
Natural forces and laws combined have an immense effect that seems much larger than their sum total, and there is no well-described natural law that can express this combined effect. We can only state that the natural laws explain that things happen, and how physical and chemical processes are followed, but they cannot describe how life or our perception of life unfolds. It is this "superset of natural laws" that has no scientific law or description.
In principle, I could do with the above explanation, but few people can relate well enough to the knowledge that science has gathered today to understand the combined force of the laws of the universe. A symbol is required instead that effectively communicates this greater whole, enabling people to intuitively grasp the immensity and general mechanisms.
I prefer to use Satan as this symbol. It describes change with no guidance, a perpetual motivation that follows its own, inner dark light. It communicates both unordered dissolution and solidification into a balance that is found as chaos and order throughout Nature. It communicates a power of divine nature, but unlike that attributed to the usual gods it is a power that requires "evil" and destruction, and a power that is unconcerned with the well-being or the state of Cosmos.
Perhaps there might be a better word, but I cannot think of one that adequately communicates the gestalt of all natural laws acting simultaneously—the only way they can function—powerfully enough to do it justice. We owe it to life to use the most powerful and inclusive expression we can find.