Mahabharata 3.203.16

श्रेष्ठं तदेव भूतानां ब्रह्मज्योतिरुपास्महेस जन्तुः सर्वभूतात्मा पुरुषः स सनातनःमनो बुद्धिरहंकारो भूतानां विषयश्च सः

śreṣṭhaṃ tadeva bhūtānāṃ brahmajyotirupāsmahesa jantuḥ sarvabhūtātmā puruṣaḥ sa sanātanaḥmano buddhirahaṃkāro bhūtānāṃ viṣayaśca saḥ

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