In the Bhakti-rasāmṛta-sindhu it is said that when Lord Kṛṣṇa was blowing His conchshell known as Pāñcajanya, many great sages who were living in the caves of the mountains immediately reacted, being awakened from their trance of meditation. They immediately saw that the hairs of their bodies were standing. Sometimes devotees in śānta-rasa become stunned, peaceful, jubilant, deliberate, reflective, anxious, dexterous and argumentative. These symptoms indicate continuous ecstasy, or established emotion.
Once a great realized sage was lamenting that the Supreme Lord Kṛṣṇa was living in Dvārakā but that he was unable to take advantage of seeing Him. After thinking this, the sage immediately became stunned. He was thinking that he was simply wasting his time. In other words, the sage lamented because the Supreme Personality of Godhead was personally present but he still could not take advantage of this because of his meditation.
When a mystic is transcendental to all kinds of mental concoctions and is situated in Brahman, his state is called trance, beyond the influence of the material conception of life. In that stage, when one hears about the transcendental pastimes of the Lord, there may be shivering in the body.
When a Brahman-realized devotee who has come to the stage of steady trance comes into contact with the eternal form of Kṛṣṇa, his transcendental pleasure increases millions of times. One great sage once inquired from another, "My dear friend, do you think that after I perfect the eightfold yoga performance I shall be able to see the eternal form of the Supreme Personality of Godhead?" This inquiry from the sage is an instance of inquisitiveness in a devotee situated in the neutral stage of devotional service.