Life of human invention

"Laws of nature are human inventions, like ghosts. Laws of logic, of mathematics are also human inventions, like ghosts. The whole blessed thing is a human invention, including the idea that it isn't a human invention. The world has no existence whatsoever outside the human imagination. It's all a ghost, and in antiquity was so recognized as a ghost, the whole blessed world we live in. It's run by ghosts. We see what we see because these ghosts show it to us, ghosts of Moses and Christ and the Buddha, and Plato, and Descartes, and Rousseau and Jefferson and Lincoln, on and on and on. Isaac Newton is a very good ghost. One of the best. Your common sense is nothing more than the voices of thousands and thousands of these ghosts from the past. Ghost and more ghost. Ghosts trying to find their place among the living." [Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance]