I have several times said, the marriage is sense gratification, sex life. But somebody may say... They say that "Marriage is legalized prostitution." It may be, but still, there is some control. Although it is called "legalized prostitution"—there is no difference between prostitution and married life—but there is some control. People become responsible. By responsible life, they can make advance. Irresponsible life will not help. Therefore loke vyavāyāmiṣa-madya-sevā nityā hi jantoḥ. So our tendency for sense gratification is controlled. Therefore it is called license. Gṛhastha life means a license for sense gratification. But then we must know that sense gratification means material life. It may be systematic or not systematic, sense gratification means material life. But our aim is to transcend this material life and come to the spiritual life, platform of spiritual life. That is required.
So there are so many processes. So that is being discussed by Kṛṣṇa. Here He is especially referring to the mystic yoga system, indriyāgniṣu juhvati, controlling the senses. So this controlling the senses, the simple method is that artificially if you want to practice yoga like Viśvāmitra Muni or Durvāsā Muni, very great... There are many big, big stories about these munis who were big, big yogīs. This Durvāsā Muni traveled all over the universe, and he went beyond the universe in the spiritual world. He saw Lord Viṣṇu personally. Still, he was defeated. There are many stories. Ambarīṣa Mahārāja. So these indriyas cannot be controlled. Durdāntendriya-kāla-sarpa-paṭalī. But these indriyas cannot do any harm to you if you take the poison teeth of this deadly snake. Poison teeth. Indriya-kāla-sarpa-paṭalī protkhāta... What is that? What is the process of taking away the poison teeth? That is bhakti-yoga. That is bhakti-yoga. That means sarvopādhi-vinirmuktaṁ tat-paratvena nirmalam, hṛṣīkeṇa... (CC Madhya 19.170). Hṛṣīkeśa means indriya. Hṛṣīkeśa-sevanam. You cannot control the senses unless you engage your senses in the service of the senses of the Lord.
The Lord has got senses. He is also a living being like us. But less intelligent class, they cannot understand. They think that something must be opposite. No. The Vedic information is nityo nityānām: "The Absolute Supreme Personality of Godhead, He is also eternal." That is explained in the Bhagavad-gītā also. Bhagavān says that "Arjuna, you and Me and all these people who have gathered here, we are nitya. We were present in the past, and we are now in the battlefield, and when we give up this body, we shall again remain the same, individual." That is explained in the Second Chapter. This individuality continues. There is no such information that all of them become one by amalgamation. That is not possible, because in the Bhagavad-gītā it..., mamaivāṁśo jīva-bhūtaḥ jīva-loke sanātanaḥ (BG 15.7). Aṁśaḥ, the particles of the Supreme, they are sanātanaḥ. It is not that by chance the spirit, whole spirit, has been broken into pieces. No. That is not possible. Because in the Bhagavad-gītā you will find, acchedyo 'yam: "It cannot be broken into pieces." Then how it became pieces? Therefore these piecemeal, the small particles of the original whole, they are sanātanaḥ. It is not that by circumstance it has become small pieces. No. And when they amalgamate... Just like they give the example that the water, when it is put into the water, again it becomes one. But scientifically, they are molecules. They remain separate. Even the sunshine, they are simply combination of shining molecules. Similarly, we are also like that, shining spiritual molecules. So sanātanaḥ, these particles are sanātanaḥ.