Treatises on Indian philosophy have multiplied in the last thirty years, in the “West as well as in India itself. And in spite of the demanding nature of this subject—it exacts, so to speak, a uniform presentation; it entails a whole succession of systems, each one of which is elaborated in a more or less independent manner—this abundance is nonetheless profitable. Each author makes his contribution in the detailed account of new views and strives to rejuvenate a somewhat refractory material, even if this involves the taking up of old views, discarded or neglected by the new generation of scholars.