Supreme Personality of Godhead is not a product of the imagination.
“According to Śrīla Viśvanātha Cakravartī Ṭhākura, the word yuktāḥ indicates those engaged in the regulative practice of bhakti-yoga. The devotees of the Lord do not abandon their intelligence and become mindless fanatics, as some fools think. As indicated by the words anumānataḥ and guṇair liṅgaiḥ, a devotee engaged in bhakti-yoga intensely searches out the Personality of Godhead through all of the rational faculties of the human brain. The word mṛgayanti, or “searching,” does not, however, indicate an unregulated or unauthorized process. If we are searching for the telephone number of a particular person, we look in the authorized telephone directory. Similarly, if we are searching for a particular product, we go to a specialized store where we are likely to find what we are looking for. Śrīla Jīva Gosvāmī points out that the Supreme Personality of Godhead is not a product of the imagination, and thus we cannot whimsically imagine what the Lord might be. Therefore, to gain information about Lord Kṛṣṇa, one must conduct a regulated search in the authorized Vedic scriptures. The word agrāhyam in this verse indicates that no one can achieve or understand Lord Kṛṣṇa by ordinary speculation or through the activities of the material senses. In this regard Śrīla Rūpa Gosvāmī states the following verse in the Bhakti-rasāmṛta-sindhu (1.2.234):
ataḥ śrī-kṛṣṇa-nāmādi na bhaved grāhyam indriyaiḥ
sevonmukhe hi jihvādau svayam eva sphuraty adaḥ
“No one can understand the transcendental nature of the name, form, quality and pastimes of Śrī Kṛṣṇa through his materially contaminated senses. Only when one becomes spiritually saturated by transcendental service to the Lord are the transcendental name, form, quality and pastimes of the Lord revealed to him.”
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Eleventh Canto, Chapter 07 – Text 23.
