। ॥ ४०८ ॥
In plain words
This whole sense of duality has one root: the mind. Take the mind away, and there's nothing left of it at all. So fix the mind on the supreme Self — the innermost reality that has been there all along.
Close to the Sanskrit
This distinction is rooted in the mind; when the mind is absent, no distinction remains. Therefore fix the mind in the supreme Self, whose nature is the innermost.