Text 10]
Kapila's Instructions on Devotional Service
1183
Kṛṣṇa. The  haṭha-yoga  system, or breathing system, is especially recommended for those who are very absorbed in the concept of bodily existence, but one who can perform the simple process of chanting Hare Kṛṣṇa can fix the mind more easily.
Three different activities are recommended for clearing the passage of breath:  pūraka ,  kumbhaka  and  recaka . Inhaling the breath is called  pūraka , sustaining it within is called  kumbhaka , and finally exhaling it is called  recaka . These recommended processes can also be performed in the reverse order. After exhaling, one can keep the air outside for some time and then inhale. The nerves through which inhalation and exhalation are conducted are technically called  iḍa  and  piṅgala . The ultimate purpose of clearing the  iḍa  and  piṅgala  passages is to divert the mind from material enjoyment. As stated in  Bhagavad-gītā , one's mind is his enemy, and one's mind is also his friend; its position varies according to the different dealings of the living entity. If we divert our mind to thoughts of material enjoyment, then our mind becomes an enemy, and if we concentrate our mind on the lotus feet of Kṛṣṇa, then our mind is a friend. By the  yoga  system of  pūraka ,  kumbhaka  and  recaka  or by directly fixing the mind on the sound vibration of Kṛṣṇa or on the form of Kṛṣṇa, the same purpose is achieved. In  Bhagavad-gītā  (8.8) it is said that one must practice the breathing exercise ( abhyāsa-yoga-yuktena ). By virtue of these processes of control, the mind cannot wander to external thoughts ( cetasā nānya-gāminā ). Thus one can fix his mind constantly on the Supreme Personality of Godhead and can attain ( yāti ) Him.
Practicing the  yoga  system of exercise and breath control is very difficult for a person of this age, and therefore Lord Caitanya recommended,  kīrtanīyaḥ sadā hariḥ : one should always chant the holy name of the Supreme Lord, Kṛṣṇa, because Kṛṣṇa is the most suitable name of the Supreme Personality of Godhead. The name Kṛṣṇa and the Supreme Person Kṛṣṇa are nondifferent. Therefore, if one concentrates his mind on hearing and chanting Hare Kṛṣṇa, the same result is achieved.
TEXT 10
मनोऽचिरात्साद्विरजं जितश्चासस्य योगिनः । वाग्वाग्रिम्यां यथालोहं भ्रातं त्यजति वै मलम् ॥१०॥
mano 'cirāt syād virajam jita-śvāsasya yoginaḥ