CC Madhya 19.203
aiśvarya dekhileo nija-sambandha se māne
“In the stage of kevalā [unalloyed devotion] a devotee does not consider the unlimited opulence of Kṛṣṇa, even though he experiences it. He takes seriously only his own relationship with Kṛṣṇa.
When a devotee reaches the stage of pure, unalloyed devotion, especially in friendship with Kṛṣṇa, he forgets the Lord’s opulences, although he sees them, and he considers himself equal to Kṛṣṇa. There is no question of actually comparing oneself to Kṛṣṇa, but because the devotee is so advanced in Kṛṣṇa consciousness, he is able to behave with Kṛṣṇa as he would with an ordinary man.