। ॥ ३६१ ॥
In plain words
The highest Self is subtler than anything the ordinary eye can catch — no coarse way of looking will ever land on it. It opens only to a mind made still and fine in deep absorption, to noble people whose intellect has been scrubbed clean enough to receive it.
Close to the Sanskrit
The truth of the supreme Self is extremely subtle; it does not lend itself to being grasped by gross vision. It must be known through samādhi, with an utterly subtle mental mode, by noble ones of thoroughly purified intellect.