The Sleepwalkers
Arthur Koestler
 Koestler starts off the book by looking back into his childhood about his philosophy of the world. He states that when he looks at the world, he looks at it as how the Babylonians did. He goes on to talk about where the Babylonians and Egyptians left off and the Greeks took over philosophy. "Homer's world is another, more colourful oyster, a floating disc surrounded by Okeanus." A central theme of The Sleepwalkers is the changing relationship between faith and reason. Koestler explores how these seemingly contradictory threads existed harmoniously in many of the greatest intellectuals of the West. He illustrates that while the two are estranged today, in the past the most ground-breaking thinkers were often very spiritual. Another recurrent theme of this book is the breaking of paradigms in order to create new ones. People - scientists included - hold onto cherished old beliefs with such love and attachment that they refuse to see the wrong in their ideas and the truth in the ideas that are to replace them. "The conclusion he puts forward at the end of the book is that modern science is trying too hard to be rational. Scientists have been at their best when they allowed themselves to behave as "sleepwalkers," instead of trying too earnestly to ratiocinate."