Valuable, undoubtedly, as are such extracts and communications from the originals in a branch of human science still so little known, yet they will not alone suffice, and, without a certain philosophic flexibility of talent in the enquirer, they will fail to afford him a proper insight into the true nature, the real spirit and tendency of those ancient systems of philosophy. That the Indian philosophy, even when it has started from the most opposite principles, and when its circuitous or devious course has branched more or less widely from the common path, is sure to wind round, and fall into the one general track--the uniform term of all Indian philosophy--is well exemplified by the second part of the Sanchyá system (called the Yoga philosophy), where we find a totally different principle proclaimed; and while it utterly abandons the primary doctrine of a self-existent principle in Nature laid down in the first part of the philosophy, it unfolds those maxims of Indian mysticism which recur in every department of Hindoo literature. That total absorption in the one thought of the Deity, that entire abstraction from all the impressions and notions of sense--that suspension of all outward, and in part even of inward, life effected by the energy of a will tenaciously fixed and entirely concentrated on a single point; and by which, according to the belief of the Indians, miraculous power and supernatural knowledge are attained,--are held up in the second part of the Sanchyá system as the highest term of all mental exertion. The word Yoga signifies the complete union of all our thoughts and faculties with God--by which alone the soul can be freed--that is, delivered from the unhappy lot of transmigration; and this, and this only, forms the object of all Indian philosophy.