Shloka 2

भीष्म उवाच विदिता: सर्वधर्मस्ति स्थित्यर्थ त्वं तु पृष्छसि । शृणु मोक्ष सनिर्वेदं पापं धर्म च मूलत:,भीष्मजीने कहा--राजन! तुम्हें सब धर्मोका ज्ञान है। तुम तो लोकमर्यादाकी रक्षा तथा मेरी प्रतिष्ठा बढ़ानेके लिये मुझसे प्रश्न कर रहे हो। अच्छा अब तुम मोक्ष, वैराग्य, पाप और धर्मका मूल क्या है, इसको श्रवण करो

bhīṣma uvāca | viditāḥ sarva-dharmāḥ tiṣṭhity-arthaṁ tvaṁ tu pṛcchasi | śṛṇu mokṣa-sa-nirvedaṁ pāpaṁ dharmaṁ ca mūlataḥ ||

Bhishma said: “O king, you already know all the duties of dharma. Yet you are asking me in order to uphold the established order of the world and to enhance my standing. Now then, listen as I explain from the very root what liberation is, what dispassion is, and what are the sources of sin and of dharma.”

{'bhīṣma uvāca''Bhishma said', 'viditāḥ': 'known, understood', 'sarva-dharmāḥ': 'all dharmas
{'bhīṣma uvāca':
all duties/laws of righteousness', 'sthity-artham (sthiti-artham)''for the sake of stability/maintenance (of order)', 'tvam': 'you', 'tu': 'but/indeed', 'pṛcchasi': 'you ask, you inquire', 'śṛṇu': 'listen', 'mokṣa': 'liberation, release', 'sa-nirvedam': 'together with nirveda
all duties/laws of righteousness', 'sthity-artham (sthiti-artham)':
along with dispassion/inner weariness toward worldly life', 'nirveda''disenchantment, detachment, spiritual dispassion', 'pāpam': 'sin, demerit, wrongdoing', 'dharmam': 'dharma
along with dispassion/inner weariness toward worldly life', 'nirveda':
righteousness, duty, moral law', 'ca''and', 'mūlataḥ': 'from the root
righteousness, duty, moral law', 'ca':

भीष्म उवाच

B
Bhishma
T
the king (Yudhishthira, implied)

Educational Q&A

Bhishma frames the inquiry as a deliberate, duty-oriented question meant to preserve social order, and he announces a foundational teaching: an analysis of moksha (liberation), nirveda (dispassion), and the root-causes of both sin (pāpa) and righteousness (dharma).

In the Shanti Parva instruction sequence, Yudhishthira questions Bhishma on dharma. Bhishma responds that the king already knows much, yet asks to uphold worldly order and honor the teacher; Bhishma then begins a systematic exposition on liberation, detachment, and moral causality.