Once settled into the gentle, predictive rhythm of the train from London to Oxford, I began to read from the guide book. And slowly, gradually, minute after minute, my perception of the world began to coalesce into a vague sense of Moment and the book revealed a new way of seeing. Glimpsing from the book to scenes passing from the window, I read, "The cosmos of Newton was easily imagined as a great celestial machine - a cosmic clock - running effortlessly and eternally. The cosmos of relativity is more obscure. It has four dimensions, rather than the three that are obvious to intuition, and time is given an equal status with distance."