Duties executed by men are useless labor if they do not provoke attraction for the message of the Lord (video)
Duties [dharma] executed by men, regardless of occupation, are only so much useless labor if they do not provoke attraction for the message of the Supreme Lord.” (Srimad-Bhagavatam, 1.2.8)
Srimad Bhagavatam class by H.H. Hanumat Presaka Swami at ISKCON Vrindavan.