The Vaiṣṇava sannyāsī is known as a tridaṇḍi-sannyāsī. The Māyāvādī sannyāsī accepts only one daṇḍa, not understanding the meaning of tri-daṇḍa. Later, many persons in the community of Śiva Svāmī gave up the ātma-niṣṭhā (devotional service) of the Lord and followed the path of Śaṅkarācārya. Instead of accepting 108 names, those in the Śiva Svāmī sampradāya follow the path of Śaṅkarācārya and accept the ten names of sannyāsa. Although Śrī Caitanya Mahāprabhu accepted the then-existing order of sannyāsa (namely eka-daṇḍa), He still recited a verse from Śrīmad-Bhāgavatam about the tridaṇḍa-sannyāsa accepted by the brāhmaṇa of Avantīpura. Indirectly He declared that within that eka-daṇḍa, one daṇḍa, four daṇḍas existed as one. Accepting ekadaṇḍa-sannyāsa without parātma-niṣṭhā (devotional service to Lord Kṛṣṇa) is not acceptable to Śrī Caitanya Mahāprabhu.
(Sri Caitanya Caritamrta----2:3:6----purport).

A devotee is always liberated in all stages of life because he is always engaged in the nine items of devotional service (śravaṇam, kīrtanam, etc.). Śrī Caitanya Mahāprabhu's philosophy holds that devotional service to Kṛṣṇa always exists in everyone's heart. It simply has to be awakened by the process of śravaṇaṁ kīrtanaṁ viṣṇoḥ (S.B.7:5:23). Śravaṇādi śuddha-citte karaye udaya (CC.2:22:107). When a person is actually engaged in devotional service, his eternal relationship with the Lord, the servant-master relationship, is awakened.
(Sri Caitanya Caritamrta----2:9:261----purport).

When Śrī Caitanya Mahāprabhu took His bath at Akrūra-ghāṭa, He submerged Himself in the water for a long time. Balabhadra Bhaṭṭācārya decided to take Śrī Caitanya Mahāprabhu to Prayāga after visiting the holy place known as Soro-kṣetra. While stopping near a village on the way to Prayāga, Śrī Caitanya Mahāprabhu fainted in ecstatic love. Some Pāṭhāna soldiers who were passing through saw Śrī Caitanya Mahāprabhu and falsely concluded that the Lord's associates, Balabhadra Bhaṭṭācārya and others, had killed the Lord with a poison named dhuturā and were taking His wealth. Thus the soldiers arrested them. However, when Śrī Caitanya Mahāprabhu regained His senses, His associates were released. He talked with a person who was supposed to be a holy man in the party. From the Koran, Śrī Caitanya Mahāprabhu established devotional service to Kṛṣṇa. Thus the leader of the soldiers, named Vijulī Khān, surrendered to Śrī Caitanya Mahāprabhu, and he and his party became devotees of Lord Kṛṣṇa. The same village today is known as the village of Pāṭhāna Vaiṣṇavas. After bathing in the Ganges at Soro, Śrī Caitanya Mahāprabhu arrived at Prayāga, at the confluence of three rivers-the Ganges, Yamunā and Sarasvatī.
(Sri Caitanya Caritamrta----2:18--summary).

Everyone has dormant kṛṣṇa-bhakti—love for Kṛṣṇa—and in the association of good devotees, that love is revealed. As stated in the Caitanya-caritāmṛta (CC.2:22:107):
nitya-siddha-kṛṣṇa-prema "sādhya" kabhu naya
śravaṇādi-śuddha-citte karaye udaya
Dormant devotional service to Kṛṣṇa is within everyone. Simply by associating with devotees, hearing their good instructions and chanting the Hare Kṛṣṇa mantra, dormant love for Kṛṣṇa is awakened. In this way one acquires the seed of devotional service. Guru-kṛṣṇa-prasāde pāya bhakti-latā-bīja (CC.2:19:151).
(Sri Caitanya Caritamrta----2:19:151----purport).

The goal of all the revealed scriptures and Vedic injunctions is Kṛṣṇa, as He Himself says in the Bhagavad-gītā (15.15): vedaiś ca sarvair aham eva vedyaḥ. Since the Vedas enjoin one to search out Kṛṣṇa and take shelter at His lotus feet, and since no Vedic process but devotional service will enable one to do this, one has to take to devotional service. According to the Bhagavad-gītā (18.55), only the bhakti process is said to be definitive. Bhaktyā mām abhijānāti. This is the conclusive statement of the Vedas, and one has to accept this process if one is serious in searching for Kṛṣṇa, the Supreme Personality of Godhead. In this connection, Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura gives the following statement. The eastern side represents devotional service to Lord Kṛṣṇa.
(Sri Caitanya Caritamrta----2:20:135----purport).

Considering all these points, devotional service to Kṛṣṇa is the real treasure house for the living entity. When one comes to the platform of devotional service, he always remains opulent in the association of the Supreme Personality of Godhead. One who is bereft of devotional service is swallowed by the black snake of the yoga system and bitten by the wasps and drones of fruitive activity, and he suffers consequent material miseries. Sometimes the living entity is misled into trying to merge into spiritual existence, thinking himself as good as the Supreme Personality of Godhead. This means that when he comes to the spiritual platform, he will be disturbed and will again return to the material platform.
(Sri Caitanya Caritamrta----2:20:135----purport).

To attain the platform of pure devotional service, one has to become spiritually pure and attain the brahma-bhūta platform, which is beyond material anxiety and material discrimination. When one approaches pure devotional service after realizing Brahman, one becomes attracted by pure devotional service. At such a time, by rendering devotional service, one gets a spiritual body with purified senses.
sarvopādhi-vinirmuktaṁ tat-paratvena nirmalam
hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate
(CC.2:19:170)
When one's senses are pure, one can render loving devotional service to Kṛṣṇa. A pure devotee can only remember Kṛṣṇa's transcendental qualities. Remembering them, he fully engages in the loving service of the Lord.
(Sri Caitanya Caritamrta----2:24:111----purport).

Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura suggests that people who are materialistically inclined and sahajiyās, or so-called Vaiṣṇavas who take everything very casually, are both viṣayīs, or materialists. Eating food offered by them causes contamination, and as a result of such contamination, even a serious devotee becomes like a materialistic man. There are six kinds of association—giving charity, accepting charity, accepting food, offering food, talking confidentially and inquiring confidentially. One should very carefully avoid associating with both the sahajiyās, who are sometimes known as Vaiṣṇavas, and the non-Vaiṣṇavas, or avaiṣṇavas. Their association changes the transcendental devotional service of Lord Kṛṣṇa into sense gratification, and when sense gratification enters the mind of a devotee, he is contaminated. The materialistic person who aspires after sense gratification cannot properly think of Kṛṣṇa.
(Sri Caitanya Caritamrta----3:6:278----purport).

Therefore, he is described in this connection as parama-vidvān. He personally preached the importance of chanting the Hare Kṛṣṇa mahā-mantra, which is approved by the revealed scriptures. As stated in the Śrīmad-Bhāgavatam (7.5.24):
iti puṁsārpitā viṣṇau bhaktiś cen nava-lakṣaṇā
kriyeta bhagavaty addhā tan manye ‘dhītam uttamam
There are nine different processes of devotional service to Kṛṣṇa, the most important being śravaṇaṁ kīrtanam (S.B.7:5:23)—hearing and chanting. Haridāsa Ṭhākura knew this science very well, and he can therefore be called, technically, sarva-śāstrādhītī. Anyone who has learned the essence of all the Vedic scriptures is to be known as a first-class educated person, with full knowledge of all śāstra.
(Sri Caitanya Caritamrta----3:11:105----purport).