। ॥ ३७१ ॥
In plain words
Whatever the mind's attention happens to be joined with in the moment — body, breath, senses, mind, intellect, and the rest — that is exactly what the yogi seems to be, right then. It is only ever a borrowed appearance, never who he actually is.
Close to the Sanskrit
With whichever of the limiting adjuncts — body, prāṇa, senses, mind, intellect, and so on — the mental mode is joined, that becomes the corresponding apparent state of this yogi.