US-P18.218ab ।US-P18.218cd ॥
In plain words
There is no other experience of the ātman than this one — none of any kind holds up. Śruti says so: "unknown to those who know it" — "the knower himself."
Close to the Sanskrit
No experience of the Self, of any kind, other than this is tenable — because of the śruti: 'unknown to those who know,' 'the knower.'