This book examines Werner Heisenberg's reflections on the role of modern physics in changing human thought, and the set of concepts and philosophical theses that go back a long way. Heisenberg was a physicist-philosopher, and throughout his career he had been preoccupied with the implications of modern physics for language and classical logic, and for the theory of knowledge. Philosophy influenced Heisenberg's thinking, and he believed in a solid relationship between physics and philosophy, which indicates that scientific results can only be understood through philosophical discourse. This is why his work "Physics and Philosophy" reveals the relationship between philosophy and physics. Physics has revolutionised the basis of philosophical thought in the light of new achievements.