Caitanya-caritāmṛta 18.16-17
bhakta-premāra yata daśā, ye gati prakāra yata duḥkha, yata sukha, yateka vikārakṛṣṇa tāhā samyak nā pāre jānite bhakta-bhāva aṅgīkare tāhā āsvādite
[bhakta-premaara yata dashaa, ye gati prakaara yata duhkha, yata sukha, yateka vikaarakrishna taahaa samyak naa paare jaanite bhakta-bhaava angeekare taahaa aasvaadite]
Blended reading (Sanskrit + English inline)
bhakta-premāra yata daśā, ye gati prakāra yata duḥkha, yata sukha, yateka vikārakṛṣṇa tāhā samyak nā pāre jānite bhakta-bhāva aṅgīkare tāhā āsvādite
Kṛṣṇa Himself cannot fully understand the conditions, the mode of progress, the happiness and unhappiness, and the moods of ecstatic love of His devotees. He therefore accepts the role of a devotee to taste these emotions fully.
My note
Source: vedabase.io