There was a great devotee of Lord Caitanya known as Kholāvecā Śrīdhara, who was a very poor man. He was doing a small business selling cups made from the leaves of plantain trees, and his income was almost nothing. Still, he was spending fifty percent of his small income on the worship of the Ganges, and with the other fifty percent he was somehow living. Lord Caitanya once revealed Himself to this confidential devotee, Kholāvecā Śrīdhara, and offered him any opulence that he liked. But Śrīdhara informed the Lord that he did not want any material opulence. He was quite happy in his present position and wanted only to gain unflinching faith and devotion unto the lotus feet of Lord Caitanya. That is the position of the pure devotees. If they can be engaged twenty-four hours each day in devotional service they do not want anything else, not even the happiness of liberation or of becoming one with the supreme.
In the Nārada-pañcarātra it is also said that any person who has developed even a small amount of devotional service doesn't care a fig for any kind of happiness derived from religiousness, economic development, sense gratification, or the five kinds of liberation. Any kind of happiness derived from religiousness, economic development, liberation or sense gratification cannot even dare to enter into the heart of a pure devotee. It is stated that as the personal attendants and maidservants of a queen follow the queen with all respect and obeisances, similarly the joys of religiousness, economic development, sense gratification and liberation follow the devotional service of the Lord. In other words, a pure devotee does not lack any kind of happiness derived from any source. He does not want anything but service to Kṛṣṇa, but even if he should have another desire, the Lord fulfills this without the devotee's asking. Rareness of Pure Devotional Service
In the preliminary phase of spiritual life there are different kinds of austerities, penances and similar processes for attaining self-realization. However, even if an executor of these processes is without any material desire, he still cannot achieve devotional service. And aspiring by oneself alone to achieve devotional service is also not very hopeful because Kṛṣṇa does not agree to award devotional service to merely anyone. Kṛṣṇa can easily offer a person material happiness or even liberation, but He does not agree very easily to award a person engagement in His devotional service. Devotional service can in fact be attained only through the mercy of a pure devotee. In the Caitanya-caritāmṛta (Madhya 19.151) it is said: "By the mercy of the spiritual master who is a pure devotee and by the mercy of Kṛṣṇa one can achieve the platform of devotional service. There is no other way."
The rarity of devotional service is also confirmed in the Tantra-śāstra where Lord Śiva says to Satī, "My dear Satī, if one is a very fine philosopher, analyzing the different processes of knowledge, he can achieve liberation from the material entanglement. By performance of the ritualistic sacrifices recommended in the Vedas one can be elevated to the platform of pious activities and thereby enjoy the material comforts of life to the fullest extent. But all such endeavors can hardly offer anyone devotional service to the Lord, not even if one tries for it by such processes for many, many thousands of births."
In the Śrīmad-Bhāgavatam it is also confirmed by Prahlāda Mahārāj that merely by personal efforts or by the instructions of higher authorities one cannot attain to the stage of devotional service. One must become blessed by the dust of the lotus feet of a pure devotee who is completely freed from the contamination of material desires.
In the Fifth Canto of Śrīmad-Bhāgavatam, 6th Chapter, 18th verse, Nārada also says to Yudhiṣṭhira, "My dear King, it is Lord Kṛṣṇa, known as Mukunda, who is the eternal protector of the Pāṇḍavas and the Yadus. He is also your spiritual master and instructor in every respect. He is the only worshipable God for you. He is very dear and affectionate, and He is the director of all your activities, both individual and familial. And what's more, He sometimes carries out your orders as if He were your messenger! My dear King, how very fortunate you are, because for others all these favors given to you by the Supreme Lord would not even be dreamt of." The purport to this verse is that the Lord easily offers liberation, but He rarely agrees to offer a soul devotional service because by devotional service the Lord Himself becomes purchased by the devotee.