Does anyone know why quantum states exist? In other words, is there an explanation for why the universe is built from discrete levels vs. some other system? I've scanned over numerous books on quantum mechanics and the history of quantum mechanics but I can never find a layman's answer to this question. A few times people have pulled out equations and tried to "explain" this discrete behavior via mathematics, but it seems to me that the math might be a tautological "explanation" since it seems that the mathematical description followed the experimental observation of natural phenomena. So is the quantum nature of our universe just something that "it is what it is"? Or is there a deeper explanation of some sort? I've always pictured the quantum leaps as being the result of some kind of standing wave phenomena, the outcome of probability functions interfering with each other or some such concept, but that was just a wild guess on my part and I've never heard of any deeper explanation. Can somebody at least provide a hint to me as to why we see things leap like they do? Thanks.