Caitanya-caritāmṛta 4.231
e saba siddhānta gūḍha, — kahite nā yuyāya nā kahile, keha ihāra anta nāhi pāya
[e saba siddhaanta goodha, — kahite naa yuyaaya naa kahile, keha ihaara anta naahi paaya]
Blended reading (Sanskrit + English inline)
e saba siddhānta gūḍha, — kahite nā yuyāya nā kahile, keha ihāra anta nāhi pāya
All these conclusions are unfit to disclose in public. But if they are not disclosed, no one will understand them.
My note
Source: vedabase.io