A class on Bhagavad Gita 4.18 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on April 7, 1974 in Mumbai, India.
Bhagavad Gita 4.18
karmaṇy akarma yaḥ paśyed
akarmaṇi ca karma yaḥ
sa buddhimān manuṣyeṣu
sa yuktaḥ kṛtsna-karma-kṛt
One who sees inaction in action and action in inaction is intelligent among men, and he is in the transcendental position, although engaged in all sorts of activities.