Here is a collection of Einstein's most important writings on physics. Although dealing with subjects that are initially difficult for most people to comprehend, in these seven essays Einstein reduces the complex to its essentials by presenting his material in a clear and readable manner. Step by step, he guides the reader through the logical processes he followed as he developed the theory of relativity, continually adding his own impressions of science and its concepts. It is in this way that we are allowed a glimpse inside the mind of this brilliant man. In these seven essays, Einstein reveals the meaning of: the theory of relativity and E=mc2 physics and reality the fundamentals of theoretical physics the common language of science the laws of science and the laws of ethics, and an elementary derivation of the equivalence of mass and energy