We make a great mistake if we accept Lord Caitanya as a conditioned soul. He is to be understood as the Supreme Absolute Truth, the Personality of Godhead, Śrī Kṛṣṇa Himself. It is therefore said of Lord Caitanya in Caitanya-caritāmṛta: "Kṛṣṇa is now present in His five diverse manifestations." Unless one is situated in uncontaminated goodness, it is very difficult to understand Lord Caitanya as the Supreme Personality of Godhead Himself. Thus in order to understand Lord Caitanya, one has to follow the direct disciples of Lord Caitanya—the six Gosvāmīs—and especially the path chalked out by Śrīla Jīva Gosvāmī.
The most astonishing fact is that Lord Caitanya, although the Supreme Personality of Godhead, Kṛṣṇa, never displayed Himself as Kṛṣṇa. Rather, whenever He was detected by intelligent devotees as Lord Kṛṣṇa and was addressed as Lord Kṛṣṇa, He denied it. Indeed, He sometimes placed His hands over His ears, protesting that one should not be addressed as the Supreme Lord. Indirectly, He was teaching the Māyāvādī philosophers that one should not falsely pose himself as the Supreme Lord and thereby misguide people. Nor should followers be foolish enough to accept anyone and everyone as the Supreme Personality of Godhead. One should test by consulting scriptures and by seeing the activities of the person in question. One should not, however, mistake Lord Caitanya and His five diverse manifestations as ordinary human beings. Lord Caitanya is the Supreme Personality of Godhead, Kṛṣṇa Himself. The beauty of Lord Caitanya is that although He is the Supreme Lord, He came as a great devotee to teach all conditioned souls how devotional service should be rendered. Conditioned souls who are interested in devotional service should follow in the exemplary footsteps of Lord Caitanya in order to learn how Kṛṣṇa can be achieved by devotional service. Thus the Supreme Lord Himself teaches the conditioned soul how He should be approached in devotional service.
By analytically studying the five diverse manifestations of the Supreme Lord, we can come to know that Lord Śrī Caitanya Mahāprabhu is the Supreme Absolute and that Lord Nityānanda is an immediate expansion of the Supreme Absolute Truth. We can also come to understand that Advaita Prabhu is also in the category of the Supreme Personality of Godhead but is subordinate to Lord Caitanya and Nityānanda Prabhu. The Supreme Personality of Godhead and His immediate subordinate expansions are worshipable by the other two—namely the representation of the internal potency and the representation of the marginal potency. The representation of the internal potency, Gadādhara, represents the confidential devotee, and the representation of the marginal potency is the pure devotee. Both of these are worshipers of the other three categories, but all of them are engaged in the transcendental service of the Supreme Personality of Godhead, Śrī Caitanya Mahāprabhu.
There is a specific difference between the pure devotee and the confidential devotee. Different potencies of the Lord are engaged in serving the Supreme Lord in different transcendental relationships. They are situated in conjugal love, in parental affection, in friendship and in servitude. By impartially judging, one can find that the internal potencies of the Supreme Lord who are engaged in conjugal love with the Lord are the best of all devotees. Thus both internal devotees and confidential devotees are attracted by the conjugal love of the Supreme Absolute Truth. These are the most confidential devotees of Lord Caitanya. Other pure devotees, who are more or less attached to Śrī Nityānanda Prabhu and Advaita Prabhu, are attracted by other transcendental relationships, such as parental affection, friendship and servitorship. When such devotees are attached to the activities of Lord Caitanya, they at once become confidential devotees in conjugal love with the Supreme Lord.
There is a very nice song sung by Śrī Narottama dāsa Ṭhākura, a great devotee and ācārya in the disciplic succession from Lord Caitanya. Narottama dāsa sings: "When will there be transcendental vibrations all over my body simply by my hearing the name of Gaurāṅga? When will tears incessantly flow from my eyes simply by my uttering the names of the Lord? When will Lord Nityānanda have mercy upon me, and when will all my desires for material enjoyment become insignificant? When shall I be purified by giving up all contaminations of material enjoyment? And when shall I be able to see the transcendental abode, Vṛndāvana? When shall I be eager to accept the six Gosvāmīs as my prime guidance? And when will I be able to understand the conjugal love of Kṛṣṇa?" No one should be eager to understand the conjugal love of Kṛṣṇa without undergoing disciplinary training under the six Gosvāmīs of Vṛndāvana.