Because foolish people have no information of the soul and how it is beyond the purview of the body and mind, they are not satisfied in the performance of their occupational duties. The question of the satisfaction of the self is raised herein. The self is beyond the gross body and subtle mind. He is the potent active principle of the body and mind. Without knowing the need of the dormant soul, one cannot be happy simply with emolument of the body and mind. The body and the mind are but superfluous outer coverings of the spirit soul. The spirit soul's needs must be fulfilled. Simply by cleansing the cage of the bird, one does not satisfy the bird. One must actually know the needs of the bird himself.
The need of the spirit soul is that he wants to get out of the limited sphere of material bondage and fulfill his desire for complete freedom. He wants to get out of the covered walls of the greater universe. He wants to see the free light and the spirit. That complete freedom is achieved when he meets the complete spirit, the Personality of Godhead.
(Srimad Bhagavatam--1:2:8--purport).

The white and fat-boweled conchshell, being gripped by the hand of Lord Kṛṣṇa and sounded by Him, appeared to be reddened by the touch of His transcendental lips. It seemed that a white swan was playing in the stems of red lotus flowers.
The redness of the white conchshell due to the lip-touch of the Lord is a symbol of spiritual significance. The Lord is all spirit, and matter is ignorance of this spiritual existence. Factually there is nothing like matter in spiritual enlightenment, and this spiritual enlightenment takes place at once by the contact of the Supreme Lord Śrī Kṛṣṇa. The Lord is present in every particle of all existence, and He can manifest His presence from anything and everything by the spiritual enlightenment of the devotee. Otherwise, He reserves the right of not being exposed to anyone and everyone. By ardent love and devotional service to the Lord, or in other words by spiritual contact with the Lord, everything becomes spiritually reddened like the conchshell in the grip of the Lord, and the paramahaṁsa, or the supremely intelligent person, plays the part of the ducking swan in the water of spiritual bliss, eternally decorated by the lotus flower of the Lord's feet.
(Srimad Bhagavatam--1:11:2--translation and purport).

Both the material and spiritual worlds belong to Kṛṣṇa. We are not proprietors of anything. It is all the property of the Supreme Lord, just as everything in the state belongs to the government, either in the prison house or outside the prison house. Conditioned life is just like life in a prison house in this material world. A prisoner cannot freely change from one cell to another. In free life one can go from one home to another home, but in prison life one cannot do that but must stay in his cell. All these planets are like cells. We are trying to go to the moon, but it is not practical by mechanical means. Whether we are American, Indian, Chinese or Russian, we have been given this planet to live on. We cannot leave—although there are millions and billions of planets and although we have machines by which we can—because we are conditioned by the laws of nature, God's laws. A man who is put into a certain cell cannot change at will without superior authority. Kṛṣṇa says in the Bhagavad-gītā that one should not try to change from one cell to another. That will not make anyone happy. If a prisoner thinks, "I am in this cell—let me request the warden to change my cell, and I will be happy," that is a mistaken idea. One cannot be happy so long as he is within the prison walls. We are trying to be happy by changing cells—from capitalism to communism. The aim should be to become free from this "ism" and that "ism." One has to change completely from this "ism" of materialism; then he can become happy. That is the program of Kṛṣṇa consciousness.
We are taking advice from the Supreme Person. He says, "My dear Arjuna, you may be elevated to the highest planetary system, which is called Brahmaloka and is desirable because life there is very long." We cannot calculate even a half-day there. It is beyond our mathematical calculations. But even in Brahmaloka there is death. Therefore Kṛṣṇa says, "Do not waste your time trying to elevate yourself or transfer yourself from this planet to that planet."
(Easy Journey to other Planets).