। ॥ ११ ॥
In plain words
In deep sleep it dissolves away. When you wake, it spreads through the whole body. And it is tied to a reflection of consciousness. That intellect is not you, brahmin.
Close to the Sanskrit
That which in sleep remains dissolved, which in waking pervades the whole body, and which is bound to the reflection of consciousness — that intellect is not you, O twice-born.