Read this extraordinary book Koyré. The development of physical science appears as a tangle of representations, theories, worldviews opposite visions and dry sterilizing often in vogue today. Koyré is interested in the human and his questions in his extraordinary imagination and in his search for truth that transcends illusions, mistakes and beliefs. This book will interest all epistemologists, physicists and other curious journey of science and psychologists for which there is a valuable tool in the construction of knowledge.