Mahabharata 12.124.31

ब्राह्मणोऽपि यथान्यायं गुरुवृत्तिमनुत्तमाम्चकार सर्वभावेन यद्वत्स मनसेच्छति

brāhmaṇo'pi yathānyāyaṃ guruvṛttimanuttamāmcakāra sarvabhāvena yadvatsa manasecchati

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