The book begins with defining the basic terms and tenets of philosophy, ending with a note on pragmatism, to emphasise that each generation has to confront its problems and challenges in its own way. Newtonian model of rationality insists that we can give a completely deterministic account of phenomena around us, while Einsteinian one asserts that our account of reality can never be fully determined. Einstein-Podolsky-Rosen experiment establishes the incompleteness of quantum mechanical descriptions. Bell’s theorem is that every model leaves certain things unexplained. Thus there is some room for logic of spiritual and religious discourse and the Indian philosophical tradition rooted in it.