18. As (scripture where speaking of the rinsing of the mouth with water) makes a reference to an act (established by Smriti), (that act is not enjoined by Sruti, but rather) the new (act of meditation on the water viewed as the dress of prâna).
The Khandogas as well as the Vâgasaneyins record, in the colloquy of the prânas, that the food of Breath comprizes everything even unto dogs and birds, and that water is its dress. To this the Khandogas add, 'Therefore when going to eat food they surround it before and after with water' (Kh. Up. V, 2, 2). And the Vâgasaneyins add (Bri. Up. VI, 1, 14), 'Srotriyas who know this rinse the mouth with water when they are going to eat and rinse the mouth with water after they have eaten, thinking that thereby they make the breath dressed. Therefore a man knowing this is to rinse the mouth with water when going to eat and after having eaten; he thereby makes that breath dressed.'--These texts intimate two things, rinsing of the mouth and meditation on the breath as dressed. The doubt then arises whether the texts enjoin both these matters, or only the rinsing of the mouth, or only the meditation on breath as dressed.
The pûrvapakshin maintains that the text enjoins both, since the one as well as the other is intimated by the text, and since both matters not being settled by any other means of knowledge are worthy of being enjoined by the Veda.--Or else, he says, the rinsing of the mouth only is enjoined, since with reference to the latter only the text exhibits the particular injunctive verbal form ('he is to rinse'). In this latter case the mention made in the text of the meditation on breath as dressed has merely the purpose of glorifying the act of rinsing.
Moreover the mere present-form, 'they rinse the mouth with water,' has no enjoining force.--But also in the passage, 'They think that thereby they make the breath dressed,' we have a mere present-form without injunctive power (and yet you maintain that that passage conveys an injunction)!--True; but as necessarily one of the two must be enjoined 1, we assume, on the ground of what the text says about the making of a dress, that what is enjoined is the meditation on water being the dress of prâna; for this is something 'new,' i.e. not established by other means of knowledge 2. The rinsing of the mouth with water, on the other hand, is already established by other means (i.e. Smriti), and therefore need not be enjoined again.--The argument founded
212:1 A glorifying arthavâda-passage would be in its place only if it were preceded by some injunction; for the glorification of certain acts is meant to induce men to comply with the injunctions concerning those acts. 213:1 Because otherwise we should have only arthavâdas. But arthavâdas have a meaning only in so far as connected with an injunction. 213:2 The above argumentation avails itself of the Sûtra, putting a new construction on it.--Tarhi dvayor avidheyatvam ity âsaṅkyânu-vâdamâtrasyâ