The goal of life is to know Kṛṣṇa, who is situated within the heart of every living being as Paramātmā, the four-handed Viṣṇu form. The yoga process is practiced in order to discover and see this localized form of Viṣṇu, and not for any other purpose. The localized viṣṇu-mūrti is the plenary representation of Kṛṣṇa dwelling within one's heart. One who has no program to realize this viṣṇu-mūrti is uselessly engaged in mock yoga practice and is certainly wasting his time. Kṛṣṇa is the ultimate goal of life, and the viṣṇu-mūrti situated in one's heart is the object of yoga practice. To realize this viṣṇu-mūrti within the heart, one has to observe complete abstinence from sex life; therefore one has to leave home and live alone in a secluded place, remaining seated as mentioned above. One cannot enjoy sex life daily at home or elsewhere and attend a so-called yoga class and thus become a yogī. One has to practice controlling the mind and avoiding all kinds of sense gratification, of which sex life is the chief. In the rules of celibacy written by the great sage Yājñavalkya it is said:
(Bhagavad-Gita---6:13-14----purport).

The highest form of transcendental worship of the Lord was exhibited by the damsels of Vrajabhūmi in the form of pure affection for the Lord, and Lord Śrī Caitanya Mahāprabhu recommends this process as the most excellent mode of worship. He accepts the Śrīmad-Bhāgavata Purāṇa as the spotless literature for understanding the Lord, and He preaches that the ultimate goal of life for all human beings is to attain the stage of premā, or love of God.
(Srimad Bhagavatam--Introduction).

One who approaches the Supreme Lord to render devotional service, but who is proud of his personality, envious of others or vengeful, is in the mode of anger. He thinks that he is the best devotee. Devotional service executed in this way is not pure; it is mixed and is of the lowest grade, tāmasaḥ. Śrīla Viśvanātha Cakravartī Ṭhākura advises that a Vaiṣṇava who is not of good character should be avoided. A Vaiṣṇava is one who has taken the Supreme Personality of Godhead as the ultimate goal of life, but if one is not pure and still has motives, then he is not a Vaiṣṇava of the first order of good character. One may offer his respects to such a Vaiṣṇava because he has accepted the Supreme Lord as the ultimate goal of life, but one should not keep company with a Vaiṣṇava who is in the mode of ignorance.
(Srimad Bhagavatam---3:29:8---purport).

Those who are too addicted to sex life cannot understand the purpose of the Absolute Truth, nor can they be clean in their habits, not to mention showing mercy to others. They cannot remain grave, and they have no interest in the ultimate goal of life. The ultimate goal of life is Kṛṣṇa, or Viṣṇu, but those who are addicted to sex life cannot understand that their ultimate interest is Kṛṣṇa consciousness. Such people have no sense of decency, and even in public streets or public parks they embrace each other just like cats and dogs and pass it off in the name of love-making.
(Srimad Bhagavatam---3:31:33---purport).

The fruitive actor enjoys only the fruits of his own activities, but a devotee, being under the guidance of the Supreme Lord, simply advances in devotional service to achieve the ultimate goal of life—to go back home, back to Godhead. The significant word in this verse is kāmān, which means "sense gratificatory desires." A devotee is devoid of all kāmān. He is anyābhilāṣitā-śūnya: a devotee is always devoid of all desires for sense gratification. His only aim is to satisfy or gratify the senses of the Lord. That is the difference between a karmī and a devotee.
(Srimad Bhagavatam---4:13:34---purport).