Nevertheless the opposite doctrine, that a man whose mind had become enlightened, might at once drop the fetters of the law, without performing all the tedious duties of student and householder, had strong supporters too among orthodox philosophers. Cases of such rapid conversion occur in the ancient traditions, and Badarayana himself was obliged to admit the possibility of freedom and salvation without works, though maintaining the superiority of the usual course, which led on gradually from works to enlightenment and salvation . It was from an unwillingness to assent to the decided teaching of the Isa-upanishad that Sankara attempted to explain vidya, knowledge, in a limited sense, as knowledge of the gods, and not yet knowledge of Brahman. He would not admit that knowledge without works could lead to darkness, and even to greater darkness than works without knowledge. Our Upanishad seems to have dreaded libertinism, knowledge without works, more even than ritualism, works without knowledge, and its true object was to show that orthodoxy and sacrifice, though useless in themselves, must always form the preparation for higher enlightenment.

How misleading Sankara's explanation may prove, we can see from the translation of this Upanishad by Rammohun Roy. He followed Sankara implicitly, and this is the sense which he drew from the text:--

49. Those observers of religious rites that perform only the worship of the sacred fire, and oblations to sages, to ancestors,

to men, and to other creatures, without regarding the worship of celestial gods, shall enter into the dark region: and those practisers of religious ceremonies who habitually worship the celestial gods only, disregarding the worship of the sacred fire, and oblations to sages, to ancestors, to men, and to other creatures, shall enter into a region still darker than the former.

'10. It is said that adoration of the celestial gods produces one consequence; and that the performance of the worship of sacred fire, and oblations to sages, to ancestors, to men, and to other creatures, produce another: thus have we heard from learned men, who have distinctly explained the subject to us.

'11. Of those observers of ceremonies whosoever, knowing that adoration of celestial gods, as well as the worship of the sacred fire, and oblation to sages, to ancestors, to men, and to other creatures, should be observed alike by the same individual, performs them both, will, by means of the latter, surmount the obstacles presented by natural temptations, and will attain the state of the celestial gods through the practice of the former.