That infinite happiness which, is grasped by the understanding (buddhi) and transcends the senses, Where he knows this, and established there, he does not deviate from the truth (tattva).
Absolute joy beyond the senses can only be grasped by understanding; when one knows it, he abides there and never wanders from this reality.
(21) that is the utmost joy which transcends [all things of] sense and which soul [alone] can grasp. When he knows this and [knowing it] stands still, moving not an inch from the reality [he sees],
6.21 When one experiences that absolute Bliss which can be intuited by the intellect and which is beyond the senses, and being established (thus) this person surely does not swerve from Reality;
6.21 Where one knows that infinite happiness which can be grasped by the intellect but is beyond the grasp of the senses, wherein established one swerves not from that condition;
6.21 When he (the Yogi) feels that Infinite Bliss which can be grasped by the (pure) intellect and which transcends the senses, and established wherein he never moves from the Reality.