Purva-Mimamsa in its Sources c8.s3.6

c8.s3.6

‘As for the *Knowledge of the Soul*, it is both *Kratvartha*—helpful to the *Sacrifice*, and *Puruṣārtha*—helpful to man; in as much as, unless one knows the Soul, he cannot undertake the performance of a sacrifice which is laid down as leading to results after death; and we find such Vedic texts as—‘The Soul, free from evil, is to be sought after, etc., etc.,’—which lay down the *Knowing of the Soul* as to be acquired through reflection, etc., and as leading to both kinds of results—Happiness and Liberation. Then again there is the text—“He obtains all desires and passes beyond all sorrows,” which speaks of all the eight mystic Perfections (of *Yoga*) accruing to the person knowing the Soul; and then lastly there is the text—“Passing his life thus, he reaches the regions of *Brahman* and from there never returns,” which directly speaks of Liberation (as resulting from Soul-Knowledge)’.—(*Tantravārtika-Translation*, p. 321, under Sū. 1.3. Adhikaraṇa, 9.)