“We have to understand Kṛṣṇa first of all, and Kṛṣṇa Himself, explaining Himself. In the Bhagavad-gītā, Kṛṣṇa does not speak anything about His pastimes with Rādhārāṇī. That is strictly prohibited. You never find Kṛṣṇa is speaking about His pastimes with the gopīs or with Rādhārāṇī. No.

He’s officially speaking about Himself, “I am this, I am that.” Mattaḥ parataraṁ nānyat kincid asti dhananjaya [Bg. 7.7]. Mām eva ye prapadyante māyām etāṁ taranti te [Bg. 7.14]. First of all try to understand Kṛṣṇa. Thoroughly study Bhagavad-gītā, and after studying Bhagavad-gītā, if you are fortunate enough to understand what is Kṛṣṇa, then, Kṛṣṇa says, surrender. That is the beginning of understanding Kṛṣṇa.

Don’t try to understand the pastimes of Kṛṣṇa with the gopīs. Just like if you make a friend, ordinarily, if you become intimate friend, then you can understand about his household affairs. If you are newly a gentleman introduced with another gentleman, you cannot ask him, “What is the affair in your household or with your wife or with your beloved?” That you cannot ask, neither it is possible to understand.”

– Srila Prabhupada’s lecture on Śrī Caitanya-caritāmṛta, Ādi-līlā 1.6
given Māyāpur, March 30, 1975