In search of a theory of everything : the philosophy behind physics In Search of a Theory of Everything is an adventurous journey in space and time in search of a unified theory of everything (TOE) by means of a rare and agile interplay between the natural philosophies of influential ancient Greek thinkers and the laws of modern physics. For a TOE all the phenomena of nature share a subtle underlying commonality and are explainable by a single overarching immutable principle. Reading the past for what it is is of tremendous value but so is its reading from the perspective of modern knowledge. Not to judge it for its flaws but to be inspired by its insights. This comparative study of the universe is the spirit of In Search of a Theory of Everything to physics through philosophy to the new via the old and in a balanced way. A relatively easier analysis of nature that of a major natural philosopher of antiquity commences every chapter to fasten the bedrock for the more complex. The transition into the more complicated views of modern physics is gradual and systematic entwining finely the two the ancient with the new the forgotten with the current by unfolding a history and a philosophy of science and connecting all the great feats of the mind and time. Those philosophers had ideas that resonate with aspects of modern science; puzzles that still baffle; and rationales that can be used to reassess completely anew fundamental but competing principles of modern physics even to speculate about open physics problems. In Search of a Theory of Everything is a new kind of sight is a philosophical insight of modern physics