Śvetadvīpa-varṇana and Śāstra-pravartana (Śānti Parva 322)
आत्मना विदहितं दुःखमात्मना विहितं सुखम् | गर्भशय्यामुपादाय भुज्यते पौर्वदेहिकम्
bhīṣma uvāca | ātmanā vidhitaṃ duḥkham ātmanā vihitaṃ sukham | garbhaśayyām upādāya bhujyate paurvadehikam ||
Wika ni Bhishma: Ang dalamhati ay hinuhubog ng sariling pagkatao, at ang ligaya man ay itinatalaga rin ng sarili. Sa sandaling ang nilalang na may katawan ay humimlay sa higaan ng sinapupunan, nagsisimula na itong danasin ang bungang natipon ng dating katawan—ang mga gawa noon na nahihinog bilang saya at sakit.
भीष्म उवाच
That both suffering and happiness arise from one’s own actions: the self is the maker of its experience, and the results of past deeds (even from a previous embodiment) inevitably mature and are undergone.
In the Shanti Parva’s instruction on dharma and right understanding, Bhishma teaches Yudhishthira about karma and rebirth: the jīva, upon entering the womb, begins to experience the accumulated fruits of prior-life actions as pleasure and pain.