evam — thus; paramparā — by disciplic succession; prāptam — received; imam — this science; rāja-ṛṣayaḥ — the saintly kings; viduḥ — understood; saḥ — that knowledge; kālena — in the course of time; iha — in this world; mahatā — great; yogaḥ — the science of one’s relationship with the Supreme; naṣṭaḥ — scattered; param-tapa — O Arjuna, subduer of the enemies.