The happiness one enjoys in this way is like the pleasure of embracing a young woman in a dream; for some time it may be pleasing, but actually the basic principle is false. The mental concoctions of happiness and distress in this material world are compared to dreams because of their falseness. All thoughts of obtaining happiness by using the material senses have a false background and therefore have no meaning.
(Srimad Bhagavatam----7:2:48----purport).

Without intelligence one cannot understand the direct activities of the senses, nor can he understand dreaming or the cessation of all gross and subtle activities. The seer and controller is the Supreme Personality of Godhead, the Supreme Soul, by whose direction the individual soul can understand when he is awake, when he is sleeping, and when he is completely in trance.
(Srimad Bhagavatam----7:7:25----purport).

The living entities are completely absorbed in the three states of wakefulness, dreaming and deep sleep through their intelligence. This intelligence is supplied by the Supreme Personality of Godhead, who accompanies the individual soul as a friend.
(Srimad Bhagavatam----7:7:25----purport).

When one is Kṛṣṇa conscious, he can realize that material existence, whether one is awake or dreaming, is nothing but a dream and has no factual value. This realization is possible by the grace of the Supreme Lord.
(Srimad Bhagavatam----7:7:27----purport).

When one's intelligence is purified, he can understand that unwanted, temporary, material life is just like a dream. Just as one suffers pain when his head is cut off in a dream, in ignorance one suffers not only while dreaming but also while awake. Without the mercy of the Supreme Personality of Godhead, one continues in ignorance and is thus subjected to material distresses in various ways.
(Srimad Bhagavatam----7:7:27----purport).

In a dream we form a society of friendship and love, and when we awaken we see that it has ceased to exist. Similarly, one's gross society, family and love are also a dream, and this dream will be over as soon as one dies. Therefore, whether one is dreaming in a subtle way or a gross way, these dreams are all false and temporary. One's real business is to understand that one is soul (ahaṁ brahmāsmi) and that his activities should therefore be different. Then one can be happy.
(Srimad Bhagavatam----7:14:3-4----purport).

According to the Vedic version, the Lord is the supreme eternal, the supreme living being. The difference between the Supreme Being and the ordinary living being is that when this material world is annihilated, all the living entities remain silent in oblivion, in a dreaming or unconscious condition, whereas the Supreme Being stays awake as the witness of everything.
(Srimad Bhagavatam----8:1:9----purport).

Throughout these changes, however, the Supreme Being remains awake. In the material condition of all living entities, there are three stages of dreaming. When the material world is awake and put in working order, this is a kind of dream, a waking dream.
(Srimad Bhagavatam----8:1:9----purport).

When the material world is awake and put in working order, this is a kind of dream, a waking dream. When the living entities go to sleep, they dream again. And when unconscious at the time of annihilation, when this material world is unmanifested, they enter another stage of dreaming. At any stage in the material world, therefore, they are alldreaming. In the spiritual world, however, everything is awake.
(Srimad Bhagavatam----8:1:9----purport).

Because of sinful activities, at night we have bad dreams, which are very troublesome. Indeed, Mahārāja Yudhiṣṭhira was obliged to see hell because of a slight deviation from devotional service to the Lord. Therefore, duḥsvapna—bad dreams—occur because of sinful activities.
(Srimad Bhagavatam----8:4:15----purport).

A devotee sometimes accepts a sinful person as his disciple, and to counteract the sinful reactions he accepts from the disciple, he has to see a bad dream. Nonetheless, the spiritual master is so kind that in spite of having bad dreams due to the sinful disciple, he accepts this troublesome business for the deliverance of the victims of Kali-yuga.
(Srimad Bhagavatam----8:4:15----purport).

The external energy of the Supreme Personality of Godhead gives all conditioned souls what appears to be an opportunity to be happy within this material world, but that is māyā; in other words, it is a dream that is never to be fulfilled. Thus every living being is illusioned by the external energy of the Supreme Lord.
(Srimad Bhagavatam----8:5:30----purport).

The word svapna means "dreams," māyā means "illusion," and manoratha means "mental creations." Dreams, illusions and mental creations are temporary. Similarly, all material creation is temporary, but Vāsudeva, the Supreme Personality of Godhead, is the eternal Absolute Truth.
(Srimad Bhagavatam----9:18:49----purport).

Because in the material world the mind is absorbed in materialistic activities, when one is asleep many contradictory activities appear in one's dreams. When one awakens, however, these activities automatically merge into the mind. Similarly, as long as one is under the influence of the material energy he makes many plans and schemes, but when one is Kṛṣṇa conscious such dreamlike plans automatically disappear.
(Srimad Bhagavatam----9:21:17----purport).

The mind is the subtle substance in which the body is created, as we actually experience in our dreams and also when we are awake in contemplation. One must understand that the process of mental speculation develops a new type of body that does not actually exist. If one can understand the nature of the mind (manorathena) and its thinking, feeling and willing, one can very easily understand how from the mind different types of bodies develop.
(Srimad Bhagavatam----10:1:41----purport).

The word yoga-nidrā is significant. When one is spiritually reconnected through self-realization, one regards his material life as having been like a dream.
(Srimad Bhagavatam----10:2:15----purport).

"What is night for all beings is the time of awakening for the self-controlled; and the time of awakening for all beings is night for the introspective sage." The stage of self-realization is called yoga-nidrā. All material activities appear to be a dream when one is spiritually awakened. Thus yoga-nidrā may be explained to be Yogamāyā.
(Srimad Bhagavatam----10:2:15----purport).