A class on Srimad Bhagavatam 1.2.11 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on October 22, 1972 in Vrindavan, India.
A transcript of the class can be found here: https://goo.gl/pwCnbf.
Srimad Bhagavatam 1.2.11
vadanti tat tattva-vidas
tattvaṁ yaj jñānam advayam
brahmeti paramātmeti
bhagavān iti śabdyate
Learned transcendentalists who know the Absolute Truth call this nondual substance Brahman, Paramātmā or Bhagavān.
