दास्त्रवति तस्मादेष प्रविविक्ताहारतरइवैव भवत्यस्माच्छारीरादात्मनः ॥ ३ ॥
In plain words
...it flows on. And so this subtler self comes to live on food finer than the body's -- finer, in fact, than the self that is bound to this very body.
Close to the Sanskrit
...flows. Therefore this one becomes, as it were, more refined in its food than this bodily self.