So, I haven't posted on here forever... not because I don't want to, but because I feel so completely inadequate to expound on what Lewis talks about. I'm not even sure what he means half the time. I should keep trying though, and not give up!
Ok, so when we look at the laws of Nature, we can say that living things are governed a certain way, and behave in a certain way because that is how they are.
People generally believe one thing or another. Either everything on earth is coincidental, and accident, or it was created on purpose. Materialist view or religious view, though there are many variations of them both, are basically the two viewpoints. These two viewpoints have always existed. Science observes what is there to be seen but it cannot go behind what is seen, it cannot say there is no such thing and on the other hand it cannot say there is such a thing. Not if it is true science.
The only thing we can really observe to find this answer is to look at man, because we are one. If you believe that we are, in fact, under some moral law that we did not create, but feel compelled to obey, but do not want to obey all the time, then where did that come from?