Book excerpt: This is a complete English translation of a highly significant Sanskrit sub-commentary vivarana purporting to be by Sankara, on the Yoga Sutras of Patanjali. The vivarana is written with great originality. The long commentary on God completely jettisons the narrow sutra definition in favour of a supreme Creator, as evidenced by many ingenious arguments on the lines of the present-day cosmological anthropic principle. The doctrine that the future already exists, and that time is purely relative, anticipate the Einstein era.