Shloka 2236
मनु-उपदेशः — भूत-उत्पत्ति, इन्द्रिय-निवृत्ति, तथा पर-स्वभाव-विवेकः
Manu’s Instruction on Elemental Origination, Sense-Withdrawal, and Discrimination of the Supreme Nature
न सुखेन न दुःखेन कदाचिदपि वर्तते । जीवात्माके आश्रित रहकर बुद्धि (सुख
na sukhena na duḥkhena kadācid api vartate |
ビーシュマは言った。「内なる自己は、その本性において、いかなる時も快楽にも苦痛にも条件づけられない。だが知性（buddhi）が身を帯びた自己（jīvātman）に依り住むとき、それは三つの相—楽、憂い、迷妄—として現れる。あるときは歓喜を味わい、あるときは悲嘆に沈み、またあるときは迷いに覆われて、楽と苦のいずれにも感じなくなる。」
भीष्म उवाच
Educational Q&A
The self (ātman/jīvātman) is not intrinsically altered by pleasure or pain; it is the intellect (buddhi), influenced by delusion (moha), that cycles through experiences of joy, grief, or numb confusion. The ethical implication is to cultivate discernment and detachment, recognizing experiences as states of mind rather than the essence of the self.
In Śānti Parva, Bhīṣma instructs Yudhiṣṭhira on dharma and liberation-oriented wisdom. Here he explains a psychological and metaphysical point: the apparent fluctuations of happiness and sorrow belong to the mind/intellect, while the self remains fundamentally untouched.