Mahabharata 12.298.15
मनः षोडशकं प्राहुरध्यात्मगतिचिन्तकाःत्वं चैवान्ये च विद्वांसस्तत्त्वबुद्धिविशारदाः
manaḥ ṣoḍaśakaṃ prāhuradhyātmagaticintakāḥtvaṃ caivānye ca vidvāṃsastattvabuddhiviśāradāḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book