Shloka 10
उशनसः (शुक्रस्य) चरितम् — The Account of Uśanā (Śukra): Yoga, Grievance, and Pacification
तथा कर्मफलैदेंही र|ज्जितस्तमसा55वृत: । विवर्णों वर्णमश्रित्य देहेषु परिवर्तते
tathā karmaphalaiḥ dehī rañjitas tamasāvṛtaḥ | vivarṇo varṇam āśritya deheṣu parivartate ||
毗湿摩说道：“同样地，具身之我为业果所染，又为黑暗（无明）所覆；虽其本无色，却因依附某一境况而取受‘色’，于是不断在诸身之中轮转。正如黑风入于红黄之粉，便似以其色染遍四方；自我本来无色，既被昏沉（tamas）遮蔽，又被业果熏染，便承当种种身的性质与职责，在一切有情的形体之间流转不息。”
भीष्म उवाच
Educational Q&A
The self is intrinsically unqualified ("colorless"), but ignorance (tamas) veils it and karma’s results stain it, making it appear to take on particular qualities and roles; this drives its repeated movement through different bodies (saṃsāra).
Bhishma is instructing on the metaphysics of rebirth: he uses an analogy of wind darkened by contact with colored powders to explain how the jīva, though pure in itself, seems to acquire attributes through ignorance and karmic conditioning and thus cycles through embodiments.