Mahabharata — Shanti Parva, Shloka 23
मातापितृगुरुपूजा-प्रशंसा
Praise of Venerating Mother, Father, and Teacher
विद्यां श्र॒त्वा ये गुरु नाद्रियन्ते प्रत्यासन्ना मनसा कर्मणा वा | तेषां पापं भ्रूणहत्याविशिष्टं नान्यस्तेभ्य: पापकृदस्ति लोके । यथैव ते गुरुभिर्भावनीया- स्तथा तेषां गुरवो<भ्यर्चनीया:
Bhīṣma uvāca | vidyāṁ śrutvā ye guruṁ nādriyante pratyāsannā manasā karmaṇā vā | teṣāṁ pāpaṁ bhrūṇahatyāviśiṣṭaṁ nānyas tebhyaḥ pāpakṛd asti loke | yathaiva te gurubhir bhāvanīyās tathā teṣāṁ guravo 'bhyarcanīyāḥ |
毗湿摩说道：凡人既已习得神圣之学，却不敬师长——虽近在身旁，仍不以心、以言、以行奉事导师（古鲁）——其罪可比（实则等同于）杀害胎中之子。于此世间，再无比他们更大的罪人。正如师者之责在于陶铸并提升弟子，弟子之责亦在于礼敬、供奉其师。
भीष्म उवाच
Educational Q&A
Learning is ethically incomplete without reverence and service to the teacher. Disrespecting the guru after receiving instruction is condemned as an extremely grave moral fault; students must honor and worship their teachers, while teachers must nurture students toward inner uplift.
In the Śānti Parva’s instruction on dharma, Bhīṣma addresses Yudhiṣṭhira with moral guidance. Here he emphasizes the reciprocal duties in education: the guru’s responsibility to cultivate the student and the student’s obligation to honor and serve the guru.