Delivered with warmth, clarity, and humor, this brief is the closest Einstein ever came to writing an autobiography. Although a very personal account, it is purely concerned with the development of his ideas, saying little about his private life or about the world-shaking events through which he lived. Starting from little Albert's early disillusionment with religion and his intense fascination with geometry, the narrative presents Einstein's "epistemological credo" then moves through his dissatisfaction with the foundations of Newtonian physics to the development of his own special and general theories of relativity, and his opposition to some of the assumptions of quantum theory.