In tbis splendid collection of the articles and addresses of P. L. Kapitza, the author remarks on the insight of the 18th century Ukrainian philosopher Skovoroda who wrote: "We must be grateful to God that He created the world in such a way that everytbing simple is true, and everything compli- cated is untrue. " At another place, Kapitza meditates on the roles played by instinct, imagination, audacity, experiment, and hard work in the develop- ment of science, and for a moment seems to despair at understanding the dogged arguments of great scientists: "Einstein loved to refer to God when...