The Supreme Personality of Godhead, Kṛṣṇa, the son of mother Yaśodā, is accessible to devotees engaged in spontaneous loving service, but He is not as easily accessible to mental speculators, to those striving for self-realization by severe austerities and penances, or to those who consider the body the same as the self.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
नायं सुखापो भगवान् देहिनां गोपिकासुतः । ज्ञानिनां चात्मभूतानां यथा भक्तिमतामिह
nāyaṃ sukhāpo bhagavān dehināṃ gopikāsutaḥ | jñānināṃ cātmabhūtānāṃ yathā bhaktimatāmiha
SB 10.9.21