There are different grades and standards of prosperity. The standard of comfort and happiness conceived by a common man engaged in material labor is the lowest grade of happiness, for it is in relationship with the body. The highest standard of such bodily comfort is achieved by a fruitive worker who by pious activities reaches the plane of heaven, or the kingdom of the creative gods with their delegated powers. But the conception of comfortable life in heaven is insignificant in comparison to the happiness enjoyed in the impersonal Brahman, and this brahmānanda, the spiritual bliss derived from impersonal Brahman, is like the water in the hoofprint of a calf compared to the ocean of love of Godhead. When one develops pure love for the Lord, he derives an ocean of transcendental happiness from the association of the Personality of Godhead. To qualify oneself to reach this stage of life is the highest perfection.
One should try to purchase a ticket to go back home, back to Godhead. The price of such a ticket is one's intense desire for it, which is not easily awakened, even if one continuously performs pious activities for thousands of lives. All mundane relationships are sure to be broken in the course of time, but once one establishes a relationship with the Personality of Godhead in a particular rasa, it is never to be broken, even after the annihilation of the material world.
(Sri Caitanya Caritamrta------1:1:56------purport).

"At the last stage of his life Śrī Mādhavendra Purī became an invalid and was completely unable to move, and Īśvara Purī so completely engaged himself in his service that he personally cleaned up his stool and urine. Always chanting the Hare Kṛṣṇa mahā-mantra and reminding Śrī Mādhavendra Purī about the pastimes of Lord Kṛṣṇa in the last stage of his life, Īśvara Purī gave the best service among his disciples. Thus Mādhavendra Purī, being very pleased with him, blessed him, saying, "My dear boy, I can only pray to Kṛṣṇa that He will be pleased with you." Thus Īśvara Purī, by the grace of his spiritual master, Śrī Mādhavendra Purī, became a great devotee in the ocean of love of Godhead."
(Sri Caitanya Caritamrta------1:9:11------purport).

Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura writes in his Anubhāṣya, “In the Caitanya-bhāgavata, Antya-khaṇḍa, Chapter Five, it is stated that Sundarānanda was anocean of love of Godhead and the chief associate of Śrī Nityānanda Prabhu. In the Gaura-gaṇoddeśa-dīpikā (127) he is stated to have been Sudāmā in kṛṣṇa-līlā. Thus he was one of the twelve cowherd boys who came down with Balarāma when He descended as Śrī Nityānanda Prabhu.
(Sri Caitanya Caritamrta------1:11:23------purport).

If anyone gets an opportunity to hear about the sweetness of Kṛṣṇa in this chapter of Śrī Caitanya-caritāmṛta, he will certainly be eligible to float in the transcendentally blissful ocean of love of God.
(Sri Caitanya Caritamrta------2:21:148------translation).