एवं परम्पराप्राप्तमिमं राजर्षयो विदुः | स कालेनेह महता योगो नष्टः परन्तप ||२||
evaṁ paramparā-prāptam imaṁ rājarṣhayo viduḥ sa kāleneha mahatā yogo naṣhṭaḥ parantapa
Translation
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.
Interpretation
Spiritual knowledge passes through parampara (disciplic succession) — from teacher to qualified student. But over time, this chain was broken, and the knowledge was lost or distorted. This is why Krishna must revive it by speaking the Gita to Arjuna now. The teaching is not a new invention but a restoration of what was forgotten.