Caitanya-caritāmṛta 8.201
rādhā-kṛṣṇera līlā ei ati gūḍhatara dāsya-vātsalyādi-bhāve nā haya gocara
[raadhaa-krishnera leelaa ei ati goodhatara daasya-vaatsalyaadi-bhaave naa haya gochara]
Blended reading (Sanskrit + English inline)
rādhā-kṛṣṇera līlā ei ati gūḍhatara dāsya-vātsalyādi-bhāve nā haya gocara
“The pastimes of Rādhā and Kṛṣṇa are very confidential. They cannot be understood through the mellows of servitude, fraternity or parental affection.
My note
Source: vedabase.io