A class on Bhagavad Gita 2.16 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on August 22, 1973 in London.
Bhagavad Gita 2.16
nāsato vidyate bhāvo
nābhāvo vidyate sataḥ
ubhayor api dṛṣṭo ’ntas
tv anayos tattva-darśibhiḥ
Those who are seers of the truth have concluded that of the nonexistent [the material body] there is no endurance and of the eternal [the soul] there is no change. This they have concluded by studying the nature of both.