I do not, however, consider this line of argumentation a safe one. Even if it could be shown that the teaching of all the chief Upanishads agrees in all essential points (a subject to which some attention will be paid later on), we should not on that account be entitled unhesitatingly to assume that the Sutras set forth the same doctrine. Whatever the true philosophy of the Upanishads may be, there remains the undeniable fact that there exist and have existed since very ancient times not one but several essentially differing systems, all of which lay claim to the distinction of being the true representatives of the teaching of the Upanishads as well as of the Sutras. Let us suppose, for argument's sake, that, for instance, the doctrine of Maya is distinctly enunciated in the Upanishads; nevertheless Ramanuja and, for all we know to the contrary, the whole series of more ancient commentators on whom he looked as authorities in the interpretation of the Sutras, denied that the Upanishads teach Maya, and it is hence by no means impossible that Badaraya/n/a should have done the same. The a priori style of reasoning as to the teaching of the Sutras is therefore without much force. But apart from any intention of arriving thereby at the meaning of the Sutras there, of course, remains for us the all-important question as to the true teaching of the Upanishads, a question which a translator of the Sutras and /S/a@nkara cannot afford to pass over in silence, especially after reason has been shown for the conclusion that the Sutras and the /S/a@nkara-bhashya do not agree concerning most important points of Vedantic doctrine. The Sutras as well as the later commentaries claim, in the first place, to be nothing more than systematisations of the Upanishads, and for us a considerable part at least of their value and interest lies in this their nature. Hence the further question presents itself by whom the teaching of the Upanishads has been most adequately systematised, whether by Badaraya/n/a, or /S/a@nkara, or Ramanuja, or some other commentator. This question requires to be kept altogether separate from the enquiry as to which commentator most faithfully renders the contents of the Sutras, and it is by no means impossible that /S/a@nkara, for instance, should in the end have to be declared a more trustworthy guide with regard to the teaching of the Upanishads than concerning the meaning of the Sutras.