A class on Bhagavad Gita 4.12 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on April 1, 1974 in Mumbai, India.
Bhagavad Gita 4.12
kāṅkṣantaḥ karmaṇāṁ siddhiṁ
yajanta iha devatāḥ
kṣipraṁ hi mānuṣe loke
siddhir bhavati karma-jā
Men in this world desire success in fruitive activities, and therefore they worship the demigods. Quickly, of course, men get results from fruitive work in this world.