Mahabharata 8.30.87

परवाच्येषु निपुणः सर्वो भवति सर्वदाआत्मवाच्यं न जानीते जानन्नपि विमुह्यति

paravācyeṣu nipuṇaḥ sarvo bhavati sarvadāātmavācyaṃ na jānīte jānannapi vimuhyati

Our plain-language meaning of this verse is waiting for scholar review.