BG Chap 15 - The nature of the object attained by the surrendered souls
Śrīla Prabhupāda describes this object as the abode (padam) of the Supreme Lord, Kṛṣṇa. That abode is not illuminated by the sun, moon or fire. The spiritual planets are self luminous. The shining effulgence of all those planets constitutes the shining sky known as the brahmajyoti. Part of that shining effulgence is covered by the mahat-tattva, the material world. Other than this, the major portion of that shining sky is full of spiritual planets, which are called Vaikuṇṭhas, chief of which is Goloka Vṛndāvana. One should be captivated by this information, otherwise being enamored with sense objects, we will endlessly transfer from one branch of the tree to another in the cycle of saṁsāra.
Baladeva Vidyābhūṣaṇa describes the object attained as the supreme form of the Lord. That padam is the svarūpa of the Lord, His form, which is full of all excellences. Though the sun, moon and light illuminate everything, they do not illuminate that form. That form, which the sun cannot reveal, illuminates the sun and all other luminaries. Kṛṣṇa alone, the master of all splendor, the form of knowledge which is revealed by itself, is to be known as the padam.
Viśvanātha Cakravartī describes the object as the supreme light of the Lord. That light is self revealing, self dependent, self sufficient, and devoid of miseries such as heat and cold caused by the sun, moon and fire. That light is non material, beyond the material senses, and reveals everything else. The Supreme Brahman lights up the whole universe, and that intense light belongs to Kṛṣṇa.
People who are without pride, which is generated from respectful treatment of others; who are free of absorption in the false; who are free of affection for wife and others; who daily consider the nature of their own ātmā and Paramātmā; who are free of dualities of happiness and distress; and who are unbewildered about the process of surrender attain the indestructible goal.