Lord Śrī Caitanya Mahāprabhu exhibited His transcendental activities for forty-eight years and then disappeared from this mortal world in the year 1455 Śakābda at Purī.
(Srimad Bhagavatam---introduction).

It is the desire of Lord Caitanya Mahāprabhu that the benevolent activities of the saṅkīrtana movement, which was inaugurated five hundred years ago in Navadvīpa, be spread all over the world for the benefit of all human beings. Unfortunately, there are many so-called followers of Caitanya Mahāprabhu who are satisfied simply to construct a temple, make a show of the Deities, collect some funds and utilize them for eating and sleeping. There is no question of their preaching the cult of Śrī Caitanya Mahāprabhu all over the world. But even though they are unable to do so, if anyone else does it they become envious. This is the condition of the modern followers of Caitanya Mahāprabhu.
(Sri Caitanya Caritamrta----1:9:47----purport).

The activities of Lord Caitanya Mahāprabhu in His travels after He accepted sannyāsa are His principal pastimes. His activities during His remaining eighteen years are called the antya-līlā, or the final portion of His pastimes.
(Sri Caitanya Caritamrta----1:13:37----purport).

All the activities of Śrī Caitanya Mahāprabhu were noted by His personal secretary Svarūpa Dāmodara and repeated to Raghunātha dāsa Gosvāmī, who memorized them. Whatever Kṛṣṇadāsa Kavirāja Gosvāmī heard is recorded in Śrī Caitanya-caritāmṛta. This is called the paramparā system, from Śrī Caitanya Mahāprabhu to Svarūpa Dāmodara to Raghunātha dāsa Gosvāmī to Kavirāja Gosvāmī. Kṛṣṇadāsa Kavirāja Gosvāmī has distributed this information in his book Caitanya-caritāmṛta. In other words, Śrī Caitanya-caritāmṛta is the essence of the instruction given through the paramparā system of the disciplic succession stemming from Śrī Caitanya Mahāprabhu.
(Sri Caitanya Caritamrta----2:2:84----purport).

By nature all the activities of Śrī Caitanya Mahāprabhu are very wonderful and sweet, and when they are described by Vṛndāvana dāsa Ṭhākura, they become like a shower of nectar.
(Sri Caitanya Caritamrta----2:4:5----translation).

Anyone who is a not a Vaiṣṇava, or an unalloyed devotee of the Supreme Lord, must be a materialist. A Vaiṣṇava living according to Śrī CaitanyaMahāprabhu's injunctions is certainly not on the materialistic platform. Caitanya means "spiritual force." All of Śrī Caitanya Mahāprabhu's activities were carried out on the platform of spiritual understanding; therefore only those who are on the spiritual platform are able to understand the activities of Śrī Caitanya Mahāprabhu. Materialistic persons cannot understand these activities and are generally known as karmīs or jñānīs. The jñānīs are mental speculators who simply try to understand what is spirit and what is matter. Their process is neti neti: "This is not spirit, this is not Brahman." The jñānīs are a little more advanced than the dull-headed karmīs, who are simply interested in sense gratification.
(Sri Caitanya Caritamrta----2:7:66----purport).

According to the law of karma, everyone is destined to suffer or enjoy according to a certain material standard, but the mercy of Lord Kṛṣṇa is so powerful that the Lord can change all the reactions of one's past karma, or fruitive activities. Lord Śrī Caitanya Mahāprabhu specifically drew attention to the mercy of Lord Kṛṣṇa. That mercy is more powerful than anything else, for it had saved Raghunātha dāsa from the strong bondage of materialistic life, which the Lord compared to a hole where people pass stool. Śrī CaitanyaMahāprabhu gave His verdict that those addicted to the materialistic way of life are like worms that are living in stool but cannot give it up. A gṛha-vrata, one who has decided to live in a comfortable home although it is actually miserable, is in a condemned position.
(Sri Caitanya Caritamrta----3:6:193----purport).