Prabhupada's lecture - Śrīmad-Bhāgavatam 1.15.32 - Los Angeles, December 10, 1973
So if you become perfect in Kṛṣṇa consciousness... Perfect in Kṛṣṇa consciousness means no more material desire. That's all. Only Kṛṣṇa. That is perfection. So long you will have a pinch of material desire, you will have to take birth. According to your desire, Kṛṣṇa will give you facility. Why there are so many types of body, eight million? Yaṁ yaṁ vāpi smaran bhāvaṁ tyajaty ante kalevaram, sadā tad-bhāva-bhāvitaḥ [Bg. 8.6]. We are making our next body by thinking of something. We have got so many thoughts, material thoughts. So at the time of death, when that thought is prominent, then I get the next moment a body like that. So if you simply think of Kṛṣṇa only, then you get a body where by which you can go to Kṛṣṇa. You can go to Kṛṣṇa. Tyaktvā dehaṁ punar janma [Bg. 4.9]. It is very scientific and very practical.
So by going to Kṛṣṇa, you can talk with Kṛṣṇa personally. You can play with Kṛṣṇa personally. You can dance with Kṛṣṇa. That is Kṛṣṇa-loka. Just like we have got a picture, rāsa dancing. Here is picture, Kṛṣṇa's. Everyone can get this opportunity. Therefore Kṛṣṇa comes to show practically how enjoyable life with Kṛṣṇa in Vṛndāvana. Kṛṣṇa is simply jolly, ānandamayo 'bhyāsāt (Vedānta-sūtra 1.1.12). In Vṛndāvana life you will see, everyone is jolly. The birds, trees and the water, the land, the cows, the calves, the inhabitants, the cowherd boys—everyone is happy simply by loving Kṛṣṇa. Simply by loving Kṛṣṇa. So Kṛṣṇa therefore manifests His līlā that "Why you are rotting in this material world? Come to Me and enjoy life eternally." That is Kṛṣṇa business. He is so kind. Yadā yadā hi dharmasya glānir bhavati bhārata [Bg. 4.7]. People, when they become debauch to enjoy life in this material world... What is the enjoyment? The last enjoyment is sex life. Is that very good enjoyment? But they have accepted. Yan maithunādi-gṛhamedhi-sukhaṁ hi tuccham [SB 7.9.45]. Maithuna means sex intercourse. That is their life and soul. They do not know. They have no information. There is better pleasure, eternal pleasure. That they do not know.