Observable phenomena are numerous, varied, capricious and largely chaotic. Underlying these phenomena are increasingly subtle layers. Uncovering these layers - by methods of observation, experiment and reasoning - gives a picture of reality that is more profound than reality appears to be.

The deeper the layer uncovered, the fewer, simpler and (often) smaller the elements that turn out to compose the complex, large-scale phenomena. The deeper the layer uncovered, the more straightforward the laws that govern these elements. And the deeper the layer uncovered, the more apparently unrelated phenomena turn out to be interrelated, through the fewer common elements.

Acquaintance with this profound reality shows nature to be more orderly and more predictable; hence, more hospitable, more reasonable and harmonious; hence, more beautiful. So much so, that where this is not the case - where nature appears to be inconsistent or awkward - it may be hypothesised that a yet deeper layer of reality is concealed there, ready to disclose further elements or laws. Unearthing new layers leads in turn back to new discoveries, at the upper level of observable phenomena. This renders nature even friendlier and more magnificent.

Avshalom Elitzur is coeditor of Quo Vadis Quantum Mechanics?: Developments of Quantum Mechanics in the Twenty-First Century (buy this book from Amazon (UK) or Amazon (USA)), and a contributor to Knowledge and the World: Challenges Beyond the Science Wars (buy this book from Amazon (UK) or Amazon (USA)). See his website.