The gopīs were advised by their superiors to bolt the doors at night, but they were so carefree that they did not carry out this order very rigidly. Sometimes, by thinking of Kṛṣṇa, they became so confident of being out of all danger that they would lie down at night in the courtyards of their houses. This is an instance of dizziness in ecstatic love due to natural affection for Kṛṣṇa.
It may be questioned why devotees of Kṛṣṇa should be attacked by dizziness, which is usually considered a sign of the modes of ignorance. To answer this question, Śrī Jīva Gosvāmī has said that the devotees of Lord Kṛṣṇa are always transcendental to all the modes of material nature; when they feel dizziness or go to sleep, they are not considered to be sleeping under the modes of nature, but are accepted as being in a trance of devotional service. There is an authoritative statement in the Garuḍa Purāṇa about mystic yogīs who are under the direct shelter of the Supreme Personality of Godhead: "In all three stages of their consciousness—namely, wakefulness, dreaming and deep sleep—the devotees are absorbed in the thought of the Supreme Personality of Godhead. Therefore, in their complete absorption in the thought of Kṛṣṇa, they do not sleep."
Alertness
A devotee once stated, "I have already conquered the modes of ignorance, and I am now on the platform of transcendental knowledge. Therefore I shall be engaged only in searching after the Supreme Personality of Godhead." This is an instance of alertness in ecstatic love. Transcendental alertness is possible when the illusory condition is completely overcome. At that stage, when in contact with any reaction of material elements, such as sound, smell, touch or taste, the devotee realizes the transcendental presence of the Supreme Personality of Godhead. In this condition the ecstatic symptoms (i.e. standing of the hair on the body, rolling of the eyeballs and getting up from sleep) are persistently visible.
When Śrīmatī Rādhārāṇī first saw Kṛṣṇa, She suddenly became conscious of all transcendental happiness, and the functions of Her different limbs were stunned. When Lalitā, Her constant companion, whispered into Her ear the holy name of Kṛṣṇa, Rādhārāṇī immediately opened Her eyes wide. This is an instance of alertness caused by hearing the sound of Kṛṣṇa's name.