"Your material body is not your real self, nor is your mind your real identity, nor your intelligence, nor your false ego. Your identity is that of an eternal servitor of the Supreme Lord, Kṛṣṇa. Your position is that you are transcendental. The superior energy of Kṛṣṇa is spiritual in constitution, and the inferior, external energy is material. Since you are between the material energy and the spiritual energy, your position is marginal. Belonging to the marginal potency of Kṛṣṇa, you are simultaneously one with and different from Him. Because you are spirit, you are not different from Kṛṣṇa, but because you are only a minute particle of Kṛṣṇa, you are different from Him."
(Teachings of Lord Caitanya).

One who is actually learned in the Vedic literature surrenders unto the Supreme Lord with great devotion and accepts Him as the supreme goal. When a living entity forgets the constitutional nature of his relationship with God, he is at once overwhelmed by the external energy. This is the cause of his false ego, his false identification of the body with the self. Indeed, his whole conception of the material universe arises from this false identification with the body, for he becomes attached to the body and its by-products. To escape this entanglement, he has only to perform his duty, namely, to surrender unto the Supreme Lord with intelligence, with devotiona, and with sincere Kṛṣṇa consciousness.
(Teachings of Lord Caitanya).

People who are entangled in academic knowledge are conditioned souls who are confused about the facts of "I" and "mine" understanding. Consequently they are unable to detach their minds from the external energy. When a person actually attains transcendental knowledge, he becomes free from this duality and engages in the transcendental loving service of the Supreme Lord. The Lord's service is the only means by which one can become detached from material activities. A person properly initiated by a bona fide spiritual master and engaged in chanting Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare gradually becomes freed from the conception of "I" and "mine" and becomes attached to the Lord's transcendental loving service in one of the five transcendental relationships.
(Teachings of Lord Caitanya).

The Lord existed before the material creation; therefore the material ingredients, nature and the living entities all emanated from Him, and after dissolution they rest in Him. When the creation is manifest, it is maintained by Him; indeed, whatever manifestation we see is but a transformation of His external energy. When the Supreme Lord withdraws His external energy, everything enters into Him. In the first of the four verses, the word aham is given three times to stress that the Supreme Personality of Godhead is full with all opulences. Aham is stated three times just to chastise one who cannot understand or believe in the transcendental nature and form of the Supreme Lord.
(Teachings of Lord Caitanya).

The Lord possesses His internal energy, His external, marginal and relative energies, and the manifestation of the cosmic world and the living entities. The external energy is manifested by the qualitative modes (guṇas) of material nature. One who can understand the nature of the living entity in the spiritual world can actually understand vedyam, or perfect knowledge. One cannot understand the Supreme Lord simply by seeing the material energy and the conditioned soul, but when one is in perfect knowledge, he is freed from the influence of the external energy. The moon reflects the light of the sun, and without the sun the moon cannot illuminate anything. Similarly, this material cosmic manifestation is but the reflection of the spiritual world.
(Teachings of Lord Caitanya).

The moon reflects the light of the sun, and without the sun the moon cannot illuminate anything. Similarly, this material cosmic manifestation is but the reflection of the spiritual world. When one is actually liberated from the spell of the external energy, he can understand the constitutional nature of the Supreme Lord. Devotional service to the Lord is the only means for attaining Him, and this devotional service can be accepted by everyone and anyone in any country and under any circumstance. Devotional service is above the four principles of religion, culminating in liberation. Actually, even the preliminary processes of devotional service are transcendental to liberation, the highest subject of ordinary religion.
(Teachings of Lord Caitanya).

By virtue of His internal energy He exists in Himself with His spiritual paraphernalia, by means of His marginal energy He exhibits Himself as the living entities, and by means of His external energy He exhibits Himself as the material world. Behind each and every exhibition of energy there is the background of eternity, His pleasure potency and His cognizance potency.
The conditioned soul is the marginal potency overpowered by the external potency. However, when the marginal potency comes under the influence of the spiritual potency, it becomes eligible for love of Godhead. The Supreme Lord enjoys six kinds of opulences, and no one can establish that He is formless or that He is without energy. If someone claims so, his contention is completely opposed to the Vedic instructions. Actually, the Supreme Personality of Godhead is the master of all energies. The living entity, however, being His infinitesimal part and parcel, can be overpowered by the material energy.
(Teachings of Lord Caitanya).

Such mentally concocted views may be very pleasing to an ordinary person, but they are full of misconceptions concerning transcendental life. One who worships the demigods out of material lust cannot attain the Supreme Personality of Godhead, although the external energy of the Lord may award such a worshiper some material results. Krsna discourages demigod worship in the Bhagavad-gītā (7.23):
antavat tu phalaṁ teṣāṁ tad bhavaty alpa-medhasām
devān deva-yajo yānti mad-bhaktā yānti mām api
"Men of small intelligence worship the demigods, and their fruits are limited and temporary. Those who worship the demigods go to the planets of the demigods, but My devotees ultimately reach My supreme planet."
(Teachings of Lord Caitanya).

Thus there is a gulf of difference between the results derived from devotional service and those derived from religious rituals. The great divine energy known as Jaḍādhiṣṭhātrī, or Mahāmāyā, the superintendent of the material world, and the material departmental directors, the demigods, as well as the products of the external energy of the Supreme Lord, are but perverted reflections of the opulence of the Supreme Lord. The demigods are actually order carriers of the Supreme Lord, and they help manage the material creation. In the Brahma-saṁhitā (5.44, 52, 49) it is stated that the workings of the supremely powerful superintendent, Durgā, are but shadows of the workings of the Supreme Lord, that the sun works just like the eye of the Supreme Lord, and that Brahmā works just like a jewel reflecting the light of the Supreme Lord. Thus in the material world all the demigods, as well as the external energy herself, Durgādevī, and all the different departmental directors are but servants of the Supreme Lord.
(Teachings of Lord Caitanya).

The aspect of the Supreme Lord as the creator is different from His aspect as Nārāyaṇa. Some of the names of the Lord as the creator are conceived by materialistic men. One cannot fully realize the essence of the Supreme Personality of Godhead by understanding His name as the creator because this material creation is a function of the external energy of the Supreme Lord. Thus the conception of God as the creator includes only the external feature. Similarly, when we call the Supreme Lord Brahman, we cannot have any understanding of His six opulences. In Brahman realization, the six opulences are not realized in full, nor is there recognition of eternity, bliss and knowledge. Therefore Brahman realization is also not a complete understanding of the Supreme Lord. Nor is Paramātmā realization, realization of the Supersoul, full realization of the Supreme Personality of Godhead, for the all-pervading nature of the Supreme Lord is but a partial representation of His opulence.
(Teachings of Lord Caitanya).

After giving a summary description of Kṛṣṇa's beauty, Rāmānanda Rāya began to speak of His spiritual energies, headed by Śrīmatī Rādhārāṇī. Kṛṣṇa has immense energetic expansions, of which three are predominant: the internal energy, the external energy and the marginal energy, comprising the living entities. This threefold division of energies is confirmed in the Viṣṇu Purāṇa (6.7.61), where it is said that Viṣṇu has one spiritual energy, which is manifested in three ways. When the spiritual energy is overwhelmed by ignorance, it is called the marginal energy. As far as the 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 and peacefulness are concerned, His spiritual energy is manifested as the pleasure-giving potency. His eternity is a manifesting energy, and His knowledge is manifested as spiritual perfection.
(Teachings of Lord Caitanya).

This cultivation of Kṛṣṇa consciousness is not material. The Lord has three general energies—namely the external energy, the internal energy and the marginal energy. The living entities are called marginal energy, and the material cosmic manifestation is the action of the external, or material, energy. Then there is the spiritual world, which is a manifestation of the internal energy. The living entities, who are called marginal energy, perform material activities when acting under the inferior, external energy. And when they engage in activities under the internal, spiritual energy, their activities are called Kṛṣṇa conscious.
(Nectar of Devotion).

As far as the planetary system of the spiritual sky is concerned, there are unlimited Vaikuṇṭha planets in the para-vyoma. The Vaikuṇṭhas are spiritual planets which are manifestations of the internal potency of the Lord, and the ratio of these planets to the material planets (external energy) in the material sky is three to one. So the poor materialist is busy making political adjustments on a planet which is most insignificant in God's creation. To say nothing of this planet earth, the whole universe with innumerable planets throughout the galaxies is comparable to a grain of mustard seed in a bag full of mustard seeds. But the poor materialist makes plans to live comfortably here and thus wastes his valuable human energy in something which is doomed to frustration. Instead of wasting his time with business speculations, he might have sought the life of plain living and high spiritual thinking and thus saved himself from perpetual materialistic unrest.
(Easy Journey to other Planets).

Indeed, all living entities within this material world are under the control of mahāmāyā, whose business is to subject them to the influence of threefold miseries: adhidaivika-kleśa (sufferings caused by the demigods, such as droughts, earthquakes and storms), adhibhautika-kleśa (sufferings caused by other living entities like insects or enemies), and adhyātmika-kleśa (sufferings caused by one's own body and mind, such as mental and physical infirmities). Daiva-bhūtātma-hetavaḥ: the conditioned souls, subjected to these three miseries by the control of theexternal energy, suffer various difficulties.
The main problem confronting the conditioned souls is the repetition of birth, old age, disease and death. In the material world one has to work for the maintenance of the body and soul, but how can one perform such work in a way that is favorable for the execution of Kṛṣṇa consciousness?
(Nectar of Instruction).

"Kṛṣṇa is compared to sunshine, and māyā is compared to darkness. Wherever there is sunshine, there cannot be darkness. As soon as one takes to Kṛṣṇa consciousness, the darkness of illusion, the influence of the external energy, will immediately vanish."
(Nectar of Instruction).