There is a paṇḍita, learned man. His name is Cāṇakya. If you, some of you, had been in India, in New Delhi, where foreign ambassadors are settled, in New Delhi, capital of India, there is a quarter which is called Cāṇakya Purī. Cāṇakya Purī. This Cāṇakya Purī has been named due to the name of this gentleman, Cāṇakya. He was a great politician and prime minister during the reign of Emperor Candragupta. Long, long years before. He was a great politician. So his politics are studied in higher, M.A. class, and so he has got some, he has got a book which is called Cāṇakya Śloka and some principles of morality, some principles of morality. So we, in our childhood, we had to study that small book, Cāṇakya Śloka. So in that principles of morality even Cāṇakya Paṇḍita says that sannimitte varaṁ tyāga vināśe niyate sati. Vināśe niyate sati: "Oh, this body, this body is destined to be destroyed. You cannot protect it. It is to be destroyed." Sannimitte varaṁ tyāge vināśe. Vināśe means it is sure to be destroyed. "As sure as death." There is nothing sure as death. Therefore this body should be utilized, sannimitte, for purpose of spiritual realization.
(Lecture on Bhagavad-Gita--2:49-51--New York--5th. April, 1966.

When a devotee is completely purified, he becomes anyābhilāṣitā-śūnya. In other words, all of his material desires become zero, being burnt to ashes, and he exists either as the Lord's servant, friend, father, mother or conjugal lover. Because one thinks constantly in this way, one's present material body and mind are fully spiritualized, and the needs of one's material body completely vanish from one's existence. An iron rod put into a fire becomes warmer and warmer, and when it is red hot it is no longer an iron rod but fire. Similarly, when a devotee constantly engages in devotional service and thinks of the Lord in his original Kṛṣṇa consciousness, he no longer has any material activities, for his body is spiritualized. Advancement in Kṛṣṇa consciousness is very powerful, and therefore even during this life such a devotee has achieved the shelter of the lotus feet of the Lord. This transcendental ecstatic existence of a devotee was completely exhibited by Śrī Caitanya Mahāprabhu.
(Srimad Bhagavatam--7:7:36--purport).

"Just by pouring water on the root of a tree, one nourishes its trunk and all of its branches, fruits and flowers, and just by supplying food to the stomach, one satisfies all the limbs of the body. Similarly, by worshiping Lord Viṣṇu one can satisfy everyone." Kṛṣṇa consciousness is not a sectarian religious movement. Rather, it is meant for all-embracingwelfare activities for the world. One can enter this movement without discrimination in terms of caste, creed, religion or nationality. If one is trained to worship the Supreme Personality of Godhead, Kṛṣṇa, who is the origin of viṣṇu-tattva, one can become fully satisfied and perfect in all respects.
(Srimad Bhagavatam--8:5:49--purport).