I am afraid I am going to drift into fiction, truthful but incomplete, for lack of some details which I cannot conjure up today and which might have enlightened us. This morning, the idea of the egg came again to my mind and I thought that I could use it as a crystal to look at Madrid in those days of July and August 1940—for why should it not enclose my own experiences as well as the past and future history of the Universe? The egg is the macrocosm and the microcosm, the dividing line between the Big and the Small which makes it impossible to see the whole. To possess a telescope without its other essential half—the microscope—seems to me a symbol of the darkest incomprehension. The task of the right eye is to peer into the telescope, while the left eye peers into the microscope.