"What Are You Going to Do With That?". Essay adapted from a talk delivered to a freshman class at Stanford University in May 2010, www.chronicle.com. October 03, 2010.
Letter to Max Born, 4 Dec. 1926, in Einstein und Born Briefwechsel (1969) p. 130 (often quoted as Gott wrfelt nicht God does not play dice, e.g. in B. Hoffmann Albert Einstein (1973) ch. 10)