Lord Śrī Kṛṣṇa descends for the specific purpose of mitigating the anxieties of the pure devotees, who are very anxious to see Him in His original Vṛndāvana pastimes. Therefore, the prime purpose of the Kṛṣṇa avatāra is to satisfy His unalloyed devotees.
(Bhagavad-Gita----4:8----purport).

The special qualification of the pure devotee is that he is always thinking of Kṛṣṇa without deviation and without considering the time or place. There should be no impediments. He should be able to carry out his service anywhere and at any time. Some say that the devotee should remain in holy places like Vṛndāvana or some holy town where the Lord lived, but a pure devotee can live anywhere and create the atmosphere of Vṛndāvana by his devotional service. It was Śrī Advaita who told Lord Caitanya, "Wherever You are, O Lord-there is Vṛndāvana."
(Bhagavad-Gita----8:14----purport).

The chanting of the Hare Kṛṣṇa mantra is clearly recommended for this age. So if one quits his body at the end of life chanting Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, he certainly reaches one of the spiritual planets, according to the mode of his practice. The devotees of Kṛṣṇa enter the Kṛṣṇa planet, Goloka Vṛndāvana.
(Bhagavad-Gita----8:13----purport).

Since this temporary material world is full of the miseries of birth, old age, disease and death, naturally he who achieves the highest perfection and attains the supreme planet, Kṛṣṇaloka, Goloka Vṛndāvana, does not wish to return.
(Bhagavad-Gita----8:15----purport).

The supreme abode of the Personality of Godhead, Kṛṣṇa, is described in the Brahma-saṁhitā as cintāmaṇi-dhāma, a place where all desires are fulfilled. The supreme abode of Lord Kṛṣṇa, known as Goloka Vṛndāvana, is full of palaces made of touchstone. There are also trees, called "desire trees," that supply any type of eatable upon demand, and there are cows, known as surabhi cows, which supply a limitless supply of milk. In this abode, the Lord is served by hundreds of thousands of goddesses of fortune (Lakṣmīs), and He is called Govinda, the primal Lord and the cause of all causes. The Lord is accustomed to blow His flute (veṇuṁ kvaṇantam). His transcendental form is the most attractive in all the worlds—His eyes are like lotus petals, and the color of His body is like the color of clouds. He is so attractive that His beauty excels that of thousands of Cupids. He wears saffron cloth, a garland around His neck and a peacock feather in His hair. In the Bhagavad-gītā Lord Kṛṣṇa gives only a small hint of His personal abode, Goloka Vṛndāvana, which is the supermost planet in the spiritual kingdom. A vivid description is given in the Brahma-saṁhitā. Vedic literatures (Kaṭha Upaniṣad 1.3.11) state that there is nothing superior to the abode of the Supreme Godhead, and that that abode is the ultimate destination (puruṣān na paraṁ kiñcit sā kāṣṭhā paramā gatiḥ). When one attains to it, he never returns to the material world. Kṛṣṇa's supreme abode and Kṛṣṇa Himself are nondifferent, being of the same quality. On this earth, Vṛndāvana, ninety miles southeast of Delhi, is a replica of that supreme Goloka Vṛndāvana located in the spiritual sky. When Kṛṣṇa descended on this earth, He sported on that particular tract of land known as Vṛndāvana, comprising about eighty-four square miles in the district of Mathurā, India.
(Bhagavad-Gita----8:21----purport).

A perfect devotee in Kṛṣṇa consciousness knows that although Kṛṣṇa is the Supreme Personality, He is all-pervading, as confirmed in the Brahma-saṁhitā. Although His personal abode is Goloka Vṛndāvana and He is always staying there, by His different manifestations of energy and by His plenary expansion He is present everywhere in all parts of the material and spiritual creation.
(Bhagavad-Gita----9:11----purport).

Since Kṛṣṇa is both matter and spirit, the gigantic universal form comprising all material manifestations is also Kṛṣṇa, and His pastimes in Vṛndāvana as two-handed Śyāmasundara, playing on a flute, are those of the Supreme Personality of Godhead.
(Bhagavad-Gita----9:19----purport).

The spiritual plant of devotional service gradually grows and grows until it penetrates the covering of the material universe and enters into the brahmajyoti effulgence in the spiritual sky. In the spiritual sky also that plant grows more and more until it reaches the highest planet, which is called Goloka Vṛndāvana, the supreme planet of Kṛṣṇa. Ultimately, the plant takes shelter under the lotus feet of Kṛṣṇa and rests there.
(Bhagavad-Gita----10:9----purport).

The pure devotee does not even want salvation. He does not want to be transferred even to the highest planet, Goloka Vṛndāvana. His only objective is to serve Kṛṣṇa wherever he may be.
(Bhagavad-Gita----11:55----purport).

The spiritual world, the abode of the Supreme Personality of Godhead, Kṛṣṇa—which is known as Kṛṣṇaloka, Goloka Vṛndāvana is described here. In the spiritual sky there is no need of sunshine, moonshine, fire or electricity, because all the planets are self-luminous.
(Bhagavad-Gita----15:6----purport).