We must, the purvapakshin says, understand by the source of all beings the non-intelligent pradhana because (in the passage immediately subsequent to the one quoted) only non-intelligent beings are mentioned as parallel instances. 'As the spider sends forth and draws in its thread, as plants grow on the earth, as from the living man hairs spring forth on the head and the body, thus everything arises here from the Indestructible.'--But, it may be objected, men and spiders which are here quoted as parallel instances are of intelligent nature.--No, the purvapakshin replies; for the intelligent being as such is not the source of the threads and the hair, but everybody knows that the non-intelligent body of the spider ruled by intelligence is the source of the threads; and so in the case of man also.--While, moreover, in the case of the preceding Sutra, the pradhana hypothesis could not be accepted, because, although some qualities mentioned, such as invisibility and so on, agreed with it, others such as being the seer and the like did not; we have here to do only with attributes such as invisibility which agree with the pradhana, no attribute of a contrary nature being mentioned.--But the qualities mentioned in the complementary passage (Mu. Up. I, 1, 9), 'He who knows all and perceives all,' do not agree with the non-intelligent pradhana; how, then, can the source of all beings be interpreted to mean the pradhana?--To this the purvapakshin replies: The passage, 'The higher knowledge is that by which the Indestructible is apprehended, that which cannot be seen,' &c., points, by means of the term 'the Indestructible,' to the source of all beings characterised by invisibility and similar attributes. This same 'Indestructible' is again mentioned later on in the passage, 'It is higher than the high Imperishable.' Now that which in this latter passage is spoken of as higher than the Imperishable may possess the qualities of knowing and perceiving everything, while the pradhana denoted by the term 'the Imperishable' is the source of all beings.--If, however, the word 'source' (yoni) be taken in the sense of operative cause, we may by 'the source of the beings' understand the embodied Self also, which, by means of merit and demerit, is the cause of the origin of the complex of things.