The aim of this paper is to analyze the Hume’s conception of methodology for philosophy. Philosophers before David Hume, mainly medieval philosophers had been much concerned to show that the various branches of philosophy fall naturally into a certain order, gradually that view of the matter come to be traditions which is summarized by Descartes in his preface to The Principles of Philosophy, “philosophy” wrote Descartes, ” is like a tree whose roots are metaphysics, whose trunk is physics, and whose branches, which arise from this trunk, are all the other sciences.” Hume set out to show that the theory of human nature, not metaphysics is the roots and that the moral sciences, not physics, are the trunk. This is the principal intent of his philosophy. Metaphysics, he argues, is in part non-sense, in part psychology in disguise-it is nonsense when it talks about essences occult qualities and the like; it is psychology when it concern us itself with causality, substance, identity. He adopted scepticism about all these abovesaid concepts. Scepticism means a philosophy according to which the knowledge of the basic problems of philosophy viz. God, soul, mind, substance, cause-effect relations and matter etc. is impossible. Knowledge may be either of idea or of the sense impressions. Therefore, Hume concludes that while the knowledge of mathematics and science is possible, the knowledge of philosophy is impossible. Hume follows this rule in his entire speculation, but softly. He realizes that one cannot follow this rule in his practical life, if we will adopt scepticism in general, we cannot do anything faithfully and cannot live whole life easily. So, David Hume is both an epistemological and metaphysical subjectivist and a moral and ethical relativist. This sceptical conclusion of Hume is rooted in the empiricism of John Locke.
