Chapter 8, Verse 10
Part of 8: Akṣhar Brahma Yog — अक्षरब्रह्मयोगप्रयाणकाले मनसाऽचलेन भक्त्या युक्तो योगबलेन चैव। भ्रुवोर्मध्ये प्राणमावेश्य सम्यक् स तं परं पुरुषमुपैति दिव्यम्॥
prayāṇa-kāle manasāchalena bhaktyā yukto yoga-balena chaiva bhruvor madhye prāṇam āveśhya samyak sa taṁ paraṁ puruṣham upaiti divyam
At the time of death, with an unwavering mind, endowed with devotion, by the power of Yoga, fixing the whole life-breath in the middle of the two eyebrows, he reaches that resplendent Supreme Person.
The Yogi gets immense inner strength and power of concentration. His mind becomes ite steady through constant practice of concentration and meditation. He practises concentration first on the lower Chakras, viz.? Muladhara? Svadhishthana and Manipura. He then concentrates on the lotus of the heart (Anahata Chakra). Then he takes the lifreath (Prana) through the Sushumna and fixes it in the middle of the two eyrows. He eventually attains the resplendent Supreme Purusha (Person) by the above Yogic practice. This is possible for one who has devoted his whole life to the practice of Yoga.