This simultaneous oneness and difference always exists in the relationship between the living entities and the Supreme Lord. From the marginal position of the living entities, this conception of "simultaneously one and different" can be understood. The living entity is just like a molecular particle of sunshine, whereas Kṛṣṇa may be compared to the blazing, shining sun itself. Lord Caitanya compared the living entities to blazing sparks from a fire and the Supreme Lord to the blazing fire of the sun. In this connection, the Lord cites a verse from Viṣṇu Purāṇa(1.22.52):
eka-deśa-sthitasyāgner
jyotsnā vistāriṇī yathā
parasya brahmaṇaḥ śaktis
tathedam akhilaṁ jagat
"Everything that is manifested within this cosmic world is but the energy of the Supreme Lord. As fire emanating from one place diffuses its illumination and heat all around, so the Lord, although situated in one place in the spiritual world, manifests His different energies everywhere. Indeed, the whole cosmic creation is composed of different manifestations of His energy."
The energy of the Supreme Lord is transcendental and spiritual, and the living entities are part and parcel of that energy. There is another energy, however, called material energy, which is covered by the cloud of ignorance. This energy, which is material nature, is divided into three modes, or guṇas (goodness, passion and ignorance). Lord Caitanya quoted from Viṣṇu Purāṇa(1.3.2) to the effect that all inconceivable energies reside in the Supreme Personality of the Lord and that the whole cosmic manifestation acts due to the Lord's inconceivable energy.
(Teachings of Lord Caitanya).

"In the age of Kali the Lord incarnates as a devotee, yellowish in color, and is always chanting Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. Although He is Kṛṣṇa, His complexion is not blackish like Kṛṣṇa's in Dvāpara-yuga but is golden. It is in Kali-yuga that the Lord engages in preaching love of Godhead through the saṅkīrtana movement, and those living entities who are intelligent adopt this process of self-realization." It is also stated in Śrīmad-Bhāgavatam (12.3.52):
kṛte yad dhyāyato viṣṇuṁ
tretāyāṁ yajato makhaiḥ
dvāpare paricaryāyāṁ
kalau taddhari-kīrtanāt
"The self-realization which was achieved in the Satya millennium by meditation, in the Tretā millennium by the performance of different sacrifices, and in the Dvāpara millennium by worship of Lord Kṛṣṇa, can be achieved in the age of Kali simply by chanting the holy names, Hare Kṛṣṇa." This is also confirmed in Viṣṇu Purāṇa (6.2.17) where it is stated:.
dhyāyan kṛte yajan yajñais
tretāyāṁ dvāpare 'rcayan
yad āpnoti tad āpnoti
kalau saṅkīrtya keśavam
"In this age there is no use in meditation, sacrifice and temple worship. Simply by chanting the holy name of Kṛṣṇa—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare—one can achieve perfect self-realization."
(Teachings of Lord Caitanya).

The last phase of the pastimes of Lord Kṛṣṇa is described in Śrīmad-Bhāgavatam as mausala-līlā. This includes the mystery of Kṛṣṇa's disappearance from this material world. In that pastime the Lord played the part of being killed by a hunter. There are many improper explanations of the last portion of Lord Kṛṣṇa's pastimes (such as descriptions of the incarnation of Kṛṣṇa's hair), but Lord Caitanya properly described these pastimes and gave them the right interpretation. As far as the incarnation of Kṛṣṇa's hair is concerned, there is mention in the Śrīmad-Bhāgavatam, the Viṣṇu Purāṇa, and the Mahābhārata. It is stated there that the Lord snatched a gray hair and a black hair from His head and that these two hairs entered into the wombs of two queens of the Yadu dynasty, namely Rohiṇī and Devakī. It is also stated that Lord Kṛṣṇa descends to the material world in order to vanquish all the demons, but some say that Kṛṣṇa is the incarnation of Viṣṇu who lies in the ocean of milk within this universe. Śrīla Rūpa Gosvāmī in his Laghu-bhāgavatāmṛta and his commentator, Śrī Baladeva Vidyābhūṣaṇa, have discussed these points fully and have established the exact truth. Śrī Jīva Gosvāmī also discussed these points in the Kṛṣṇa-sandarbha.
(Teachings of Lord Caitanya).

The words api and ca are adverbs and can be used for virtually any purpose. The word ca, or "and," can render seven different readings to the whole construction.
The Lord thus established the import of the eleven words in the Ātmārāma verse, and then He began to explain the import of each item as follows. The word brahman indicates the greatest in all respects. The Lord is the greatest in all opulences. No one can excel Him in wealth, strength, fame, beauty, knowledge and renunciation. Thus the word brahman indicates the Supreme Personality of Godhead, Kṛṣṇa. In the Viṣṇu Purāṇa (1.12.57) the word brahman is given to indicate the greatest of all; the Supreme Lord is the greatest, and there is no limit to His expanding as the greatest. One may conceive of Brahman's greatness, yet this greatness grows in such a way that no one can estimate how great He actually is.
(Teachings of Lord Caitanya).

Just as some devotees are perfected by the execution of devotional service, so some of them are eternally perfect. Of those following the regulative principles of devotional service, there are the advanced and the beginners; and in the transcendental loving service of the Lord, there are sixteen types of devotees. Thus the ātmārāmas can be considered to exist in thirty-two divisions. If the words muni, nirgrantha, ca and api are applied to the thirty-two classes, then there are fifty-eight different types of devotees. All these devotees can be described by one word: ātmārāma. There may be many different kinds of trees standing in the forest, but the word "tree" describes them all.
Thus the Lord gave sixty different meanings to the word ātmārāma. In addition, He said that ātmā means "the living entity, beginning from the first living creature, Brahmā, down to the ant." He cited a verse from the Sixth Chapter of Viṣṇu Purāṇa in which it is stated that all the energies of the Lord are spiritual. Although this is the case, the energy which is known as the source of the living entity is called spiritual, but the other energy, which is full of ignorance and is manifested in material activities, is called material nature. Even in the material creation, the living entities are innumerable. If by chance a living entity in the material world can associate with a pure devotee, he can engage in the pure devotional service of Kṛṣṇa. "Formerly I thought of sixty different meanings for the word ātmārāma," the Lord told Sanātana Gosvāmī, "but here another meaning comes to My mind by your association."
(Teachings of Lord Caitanya).

In all Vedic literatures, including Bhagavad-gītā and Viṣṇu Purāṇa, much evidence is given to distinguish between the energy and the energetic. In Bhagavad-gītā (B.G.7:4) it is clearly stated that earth, water, fire, air and ether are the five principal gross elements of the material world and that mind, intelligence and false ego are the three subtle elements. All material nature is divided into these eight elements which together comprise the inferior nature, or energy, of the Lord. Another name for this inferior nature is māyā, or illusion. Beyond these eight inferior elements there is a superior energy, which is called parā-prakṛti. That parā-prakṛti is the living entity, who is found in great numbers throughout the material world. He is indicated in Bhagavad-gītā (B.G.7:5) as jīva-bhūtām. The purport is that the Supreme Lord is the Absolute Truth, the energetic, and as such He has His energies. When His energy is not properly manifested, or when it is covered by some shadow, it is called māyā-śakti. The material cosmic manifestation is a product of that covered māyā-śakti.
(Teachings of Lord Caitanya).

According to the Viṣṇu Purāṇa (6.7.61-3), the living entities are considered kṣetrajña energy. Although the living entity is part and parcel of the Supreme Lord and is fully cognizant, he nonetheless becomes entrapped by material contamination and suffers all the miseries of material life. Such living entities live in different ways in accordance to the degree of their entanglement in material nature. The original energy of the Supreme Lord is spiritual and nondifferent from the Supreme Absolute Personality of Godhead. The living entity is called the marginal energy of the Supreme Lord, and the material energy is called the inferior energy. Due to his material inebriety, the living entity in the marginal position becomes entangled with the inferior energy, matter. At such a time he forgets his spiritual significance, identifies himself with material energy and thereby becomes subjected to the threefold miseries. Only when he is free from such material contamination can he be situated in his proper position.
(Teachings of Lord Caitanya).

That evening, after the Lord had taken His bath and seated Himself, Rāmānanda Rāya came to see Him with a servant. He offered his respects and sat down before the Lord. Before Rāmānanda Rāya could even ask the Lord a question about the advancement of spiritual knowledge, the Lord Himself said, "Please quote some verses from scripture about the ultimate goal of human life."
Śrī Rāmānanda Rāya at once replied: "A person who is sincere in his occupational duty will gradually develop a sense of God consciousness." He also quoted a verse from Viṣṇu Purāṇa(3.8.9) which states that the Supreme Lord is worshiped by one's occupational duty and that there is no alternative for satisfying Him. The purport is that human life is meant for understanding one's relationship with the Supreme Lord, and by acting in that way any human being can dovetail himself in the service of the Lord by discharging his prescribed duties. For this purpose human society is divided into four classes: the intellectuals (brāhmaṇas), the administrators (kṣatriyas), the merchants (vaiśyas), and the laborers (śūdras). For each class there are prescribed rules and regulations as well as occupational functions. The prescribed duties and qualities of the four classes are described in Bhagavad-gītā (18.41-44). A society which is civilized and organized should follow the prescribed rules and regulations for the particular classes. At the same time, for spiritual advancement, the four stages of āśrama must also be followed: namely, student life (brahmacarya), householder (gṛhastha), retired (vānaprastha) and the renounced life (sannyāsa).
(Teachings of Lord Caitanya).

Lord Caitanya rejected the statement cited by Rāmānanda Rāya from Viṣṇu Purāṇa because the Lord wished to reject a class of philosophers known as karma-mīmāṁsa. Karma-mīmāṁsa followers accept God to be subject to one's work. Their conclusion is that if one works nicely, God is bound to give good results. Thus one can understand from the statement of Viṣṇu Purāṇa that Viṣṇu, the Supreme Lord, has no independence but is bound to award a certain kind of result to the worker. Such a dependent goal becomes subjected to the worshiper, who accepts the Supreme Lord to be both impersonal and personal, as he may wish. Actually this philosophy stresses the impersonal feature of the Supreme Absolute Truth. Because Lord Caitanya did not like such impersonalism, He rejected it.
(Teachings of Lord Caitanya).

After giving a summary of the beauty of Kṛṣṇa, Rāmānanda Rāya began to speak of the spiritual energy of Kṛṣṇa, which is headed by Śrīmatī Rādhārāṇī. Kṛṣṇa has immense energetic expansions. Three energies are predominant: the internal energy, external energy and marginal energy. This is confirmed in the Sixth Chapter ofViṣṇu Purāṇa where it is said that Viṣṇu has one energy, which is called spiritual energy, and it is manifested in three ways. When spiritual energy is overwhelmed by ignorance, it is called marginal energy. As far as spiritual energy itself is concerned, it is exhibited in three forms because Kṛṣṇa is a combination of eternity, bliss and knowledge. As far as His bliss is concerned, His spiritual energy is manifested as the pleasure giving potency. His eternity is manifested as energy, and His knowledge is manifested as spiritual perfection. As confirmed in Viṣṇu Purāṇa(1.12.69): "The pleasure potency of Kṛṣṇa gives Kṛṣṇa transcendental pleasure and bliss." Thus when Kṛṣṇa wants to enjoy pleasure, He exhibits His own spiritual potency known as hlādinī.
(Teachings of Lord Caitanya).