George Gilder, Microcosm (Simon & Schuster: August 1, 1989), pp. 21-2.
It is understandable that humans resist the microcosm and even rebel against it. Quantum theory is an abstruse and difficult set of ideas. It baffles many of its leading exponents and it perplexed Albert Einstein to his grave. Defying the testimony of the human senses, the new physics is contrary to all human intuition and metaphor. In the quantum domain, all conventional analogies of physics — such as tops, springs, and billiard balls — are radically misleading. Therefore, we cannot "understand" quantum theory in the way we can comprehend classical physics. Quantum theory simply does not make sense.