Vimokṣa-niścaya: Pañcaśikha’s Analysis of Aggregates, Guṇas, and Tyāga (मोक्षनिर्णयः)
भीष्म उवाच दोषैर्मूलादवच्चिन्नैरविंशुद्धात्मा विमुच्यते । विनाशयति सम्भूतमयस्मयमयो यथा । तथा कृतात्मा सहजैदररषि्नश्यति तामसै:
bhīṣma uvāca doṣair mūlād avacchinnair aviśuddhātmā vimucyate | vināśayati sambhūtam ayasmayam ayo yathā | tathā kṛtātmā sahajair doṣair naśyati tāmasaiḥ ||
Bhishma disse: Ó rei, quando as faltas são cortadas juntamente com a sua raiz, o eu interior—antes impuro—purifica-se e é libertado do cativeiro mundano. Assim como uma ferramenta de ferro, feita também de ferro, pode romper uma corrente de ferro e, nesse processo, desgasta-se até se consumir, do mesmo modo o intelecto disciplinado e purificado destrói os defeitos inatos nascidos do tamas; e, tendo realizado essa destruição, ele próprio se aquieta e repousa.
भीष्म उवाच
Freedom comes when defects are removed along with their root-cause (ignorance/delusion). A purified, disciplined intellect can eliminate innate tamasic tendencies; once its task is done, even that corrective instrument becomes still, indicating the settling of mental activity after purification.
In the Śānti Parva instruction to Yudhiṣṭhira, Bhīṣma explains a method of inner purification: destroy faults at their source. He illustrates it with a simile—iron cutting iron—showing how a tool used to remove bondage may itself be worn away, paralleling how the refined intellect quiets after removing tamasic defects.