In the Ninth Canto of the Bhāgavatam, 4th Chapter, 49th verse, the lord of Vaikuṇṭha replies to Durvāsā Muni thusly: "My pure devotees are always satisfied being engaged in devotional service, and therefore they do not aspire even after the five liberated stages, which are 1) to be one with Me, 2) to achieve residence on My planet, 3) to have My opulences, 4) to possess bodily features similar to Mine and 5) to gain personal association with Me. So, when they are not interested even in these liberated positions, you can know how little they care for material opulences or material liberation."
There is a similar prayer by the nāgapatnī (wives of the Kāliya serpent), in the Tenth Canto of Śrīmad-Bhāgavatam, 16th Chapter, verse 33. The nāgapatnī say there, "My dear Lord, the dust of Your lotus feet is very wonderful. Any person who is fortunate enough to achieve this dust does not care for heavenly planets, lordship over all the planetary systems, the mystic perfections of yoga or even liberation from material existence. In other words, anyone who adores the dust of Your lotus feet does not care a fig for all other perfectional stages."
There is a similar statement in the Tenth Canto, 87th Chapter, 17th verse, when the Śrutis, the Vedas personified, prayed to the Lord as follows: "My dear Lord, it is very difficult to understand spiritual knowledge. Your appearance here just as You are, is to explain to us this most difficult subject of knowledge of the spirit. As such, Your devotees who have left their domestic comforts to associate with the liberated ācāryas (teachers) are now fully merged in the devotional service of Your Lordship, and thus they do not care for any so-called liberation."
In explaining this verse it should be noted that spiritual knowledge means understanding the self and the supersoul, or superself. The individual soul and the supersoul are qualitatively one, and therefore both of them are known as Brahman, or spirit. But knowledge of Brahman is very difficult to understand. There are so many philosophers engaged in the matter of understanding the soul, but they are unable to make any tangible advancement. It is confirmed in the Bhagavad-gītā that out of many millions of persons, only one may try to understand what is spiritual knowledge, and out of many such persons who are trying to understand, only one or a few may know what is the Supreme Personality of Godhead. So this verse says that spiritual knowledge is very difficult to achieve, and so in order to make it more easily attainable, the Supreme Lord Himself comes in His original form as Śrī Kṛṣṇa and gives His instruction directly to an associate like Arjuna, just so that the people in general may take advantage of this spiritual knowledge. This verse also explains that liberation means having completely given up all the material comforts of life. Those who are impersonalists are satisfied by simply being liberated from the material circumstances, but those who are devotees can automatically give up material life and also enjoy the transcendental bliss of hearing and chanting the wonderful activities of Lord Kṛṣṇa.