kūṭa-sthaḥ

ज्ञानविज्ञानतृप्तात्मा कूटस्थो विजितेन्द्रियः

kūṭa-sthaḥ — undisturbed

Content in knowledge and in what has been realised, unmoved, senses conquered — such a one is said to be joined.

ये त्वक्षरमनिर्देश्यमव्यक्तं पर्युपासते

kūṭa-stham — the unchanging

But those who worship the imperishable, the undefinable, the unmanifest, the all-pervading, the unthinkable, the unmoving, the fixed, the everlasting —

द्वाविमौ पुरुषौ लोके क्षरश्चाक्षर एव च

kūṭa-sthaḥ — the liberated

There are two beings in this world: the perishable and the imperishable. All creatures are the perishable; the unchanging is called the imperishable.