Mahabharata 14.43.33

बुद्धिरध्यवसायेन ध्यानेन च महांस्तथानिश्चित्य ग्रहणं नित्यमव्यक्तं नात्र संशयः

buddhiradhyavasāyena dhyānena ca mahāṃstathāniścitya grahaṇaṃ nityamavyaktaṃ nātra saṃśayaḥ

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