A class on Srimad Bhagavatam 1.2.8 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on October 19, 1972 in Vrindavan, India.
A transcript of the class can be found here: https://goo.gl/1TDbYw.
Srimad Bhagavatam 1.2.8
dharmaḥ svanuṣṭhitaḥ puṁsāṁ
viṣvaksena-kathāsu yaḥ
notpādayed yadi ratiṁ
śrama eva hi kevalam
The occupational activities a man performs according to his own position are only so much useless labor if they do not provoke attraction for the message of the Personality of Godhead.