Mahabharata 12.178.4
स जन्तुः सर्वभूतात्मा पुरुषः स सनातनःमनो बुद्धिरहंकारो भूतानि विषयाश्च सः
sa jantuḥ sarvabhūtātmā puruṣaḥ sa sanātanaḥmano buddhirahaṃkāro bhūtāni viṣayāśca saḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book