imaṁ rājarṣayo viduḥ
sa kāleneha mahatā
yogo naṣṭaḥ paran-tapa
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.
This supreme science was thus received through the chain of disciplic succession, and the saintly kings understood it in that way. But in course of time the succession was broken, and therefore the science as it is appears to be lost.
. . .
एवं परम्पराप्राप्तमिमं राजर्षयो विदुः ।
स कालेनेह महता योगे नष्टः परन्तप ॥ २ ॥