B.G 6.07 and 08

जितात्मनः प्रशान्तस्य परमात्मा समाहितः। शीतोष्णसुखदुःखेषु तथा मानापमानयोः ॥७॥

ज्ञानविज्ञानतृप्तात्मा कूटस्थो विजितेंद्रियः। युक्त इत्युच्यते योगी समलोष्टाश्मकाञ्चनः ॥८॥

jitātmanaḥ praśāntasya paramātmā samāhitaḥ। śītoṣṇasukhaduḥkheṣu tathā mānāpamānayoḥ ॥7॥

jñānavijñānatr̥ptātmā kūṭastho vijiteṁdriyaḥ। yukta ityucyate yogī samaloṣṭāśmakāñcanaḥ ॥8॥

One who is self controlled and serene is situated with equanimity in the Supreme Personality, the Lord. He is of a steady mind, unperturbed by cold or heat, pleasure or pain, honour or dishonour. Having conquered the senses, he is content with knowledge and special knowledge. Such a practitioner of Yoga is said to have achieved perfection in Yoga, who sees equally a lump of mud, a stone, and a gold.

Gīta Bhāshya 6.07 and 08

'vijñānam' - special knowledge, which is nothing but transcendental knowledge. 'kūṭasthaḥ' - one without change or distortions, similar to sky. 'Yogi' - practitioner of Yoga. 'Yukta' - one who has achieved perfection. The results of self-control are explained. Practice of self-control results in transcendental knowledge, which in turn results in complete control over senses, that results in steadfastness.

The results of self-control are explained in the verse, 'jitātmana', i.e. one who is self controlled.

Indeed, the self-controlled person experiences tranquility. For most of the time, his mind does not wander among sense objects. Then, the Supreme Soul is correctly apprehended and abides in his heart. It means he becomes the one with transcendental knowledge.

The verse, 'śītoṣṇetyādi', i.e. 'cold or heat, etc.', clarifies the characteristics of the person with transcendental knowledge.

The expression 'in cold and heat, etc.' indicates steadfastness. Having obtained the knowledge, and the transcendental knowledge, the person conquers the senses, and is thus contented, and this becomes the cause for steadfastness. The word 'vijñānam' means special knowledge, which is nothing but transcendental knowledge. Thus, it is said:

"That which cannot be understood by ordinary people about Me, that special knowledge because of which I become visible to gods, is celebrated in the world as actual knowledge."

- stated thus.

"Indeed, from hearing and contemplation arises that knowledge. By that knowledge vision of Lord Vishnu becomes possible. That special knowledge (vijñānaṁ) was explained by Lord Shambhu."

"The special knowledge ('vijñāna') is that knowledge which enabled lord Shiva to have special vision."

- and such other testimonials as well.

The word 'kūṭasthaḥ' means without change or distortions. Situated 'like a sky' (kūṭavat) is the etymological origin of the word. The word 'kūṭam' means the sky.

"The word 'kūṭaṁ' is explained as the void, the space, the sky, or that which brings about conjunction. "

- states the dictionary.

The word 'Yogi' refers to the practitioner of Yoga. The word 'Yukta' refers to one who has achieved perfection. Thus, the expression 'yukta ityucyate yogī' means 'thus a practicing Yogi achieves perfection in Yoga'.