Indriya. Because we are being deviated from our eternal relationship with God, Kṛṣṇa, on account of our too much being engaged in sense gratification. Bhogaiśvarya-prasaktānāṁ tayāpahṛta-cetasām (BG 2.44). Lord says, Kṛṣṇa says, "Those who are too much after bhoga and aiśvarya, material enjoyment and material opulence," prasaktānāṁ tayāpahṛta-cetasām, "whose heart has been taken away by the process of sense gratification, for them, it is very difficult to be situated in samādhi." Bhogaiśvarya-prasaktānāṁ tayāpahṛta-cetasām.
So yoga, yoga means to control the senses. Those who are too much in the bodily concept of life, for them, this haṭha-yoga is prescribed just to control the sense by some mechanical way. You sit down, āsana, prāṇāyāma, dhyāna, dhāraṇā, pratyāhāra—there are eight different stages of fulfilling the yoga practice—and then coming to the position of samādhi. Samādhi means fully situated in Kṛṣṇa consciousness. That is real samādhi.
Dhyānāvasthita-tad-gata-manasā (SB 12.13.1). Dhyānāvasthita-tad-gata-manasā paśyanti yaṁ yoginaḥ. This is the definition of yogīs. They are in meditation, and the mind, being absorbed in the thought of Viṣṇu, and yaṁ paśyanti yoginaḥ. The yoginaḥ, by controlling the senses, concentrating the mind upon Viṣṇu, they become yogī. Dhyānāvasthita-tad-gata-manasā: mind is absorbed in the thought of Viṣṇu. That is perfection of yoga.
So that is one method. Those who are too much, I mean to say, thinking of this body, for them, this haṭha-yoga system is prescribed. But the aim of that haṭha-yoga system is to see or search out the Supreme Personality of Godhead, or Paramātmā. Īśvaraḥ sarva-bhūtānāṁ hṛd-deśe arjuna tiṣṭhati (BG 18.61). The Supreme Lord is situated in everyone's heart, and by this yoga practice, by samādhi, one is situated constantly seeing the Supreme Personality of Godhead Viṣṇu. That is samādhi.
But there is another method, supreme method. That will be explained in the Seventh Chapter of the Bhagavad-gītā. At the end of the Sixth Chapter the conclusion is:
- yoginām api sarveṣāṁ
- madgatenāntarātmanā
- śraddhāvān bhajate yo māṁ
- sa me yuktatamo mataḥ
- (BG 6.47)
"Anyone who is always thinking of Me within his mind," śraddhāvān, "not mechanically, but with faith and love," śraddhā, and bhajate—bhajate means bhaja sevayam, engaged in the service—"such person is the first-class yogī." That is recommended by Kṛṣṇa.