In this verse the word dharma-dugha is significant, for it indicates kama-dhenu. Kama-dhenu is also known as surabhi. Surabhi cows inhabit the spiritual world, and, as stated in Brahma-samhita, Lord Krsna is engaged in tending these cows: surabhir abhipalayantam [Bs. 5.29]. One can milk a surabhi cow as often as one likes, and the cow will deliver as much milk as one requires. Milk, of course, is necessary for the production of so many milk products, especially clarified butter, which is required for the performance of great sacrifices. Unless we are prepared to perform the prescribed sacrifices, our supply of the necessities of life will be checked. Bhagavad-gita confirms that Lord Brahma created human society along with yajna, the performance of sacrifice. Yajna means Lord Visnu, the Supreme Personality of Godhead, and sacrifice means working for the satisfaction of the Supreme Personality of Godhead. In this age, however, it is very difficult to find qualified brahmanas who can perform sacrifices as prescribed in the Vedas. Therefore it is recommended in Srimad-Bhagavatam (yajnaih sankirtana-prayaih) that by performing sankirtana-yajna and by satisfying the yajna-purusa, Lord Caitanya, one can derive all the results derived by great sacrifices in the past. King Prthu and others derived all the necessities of life from the earthly planet by performing great sacrifices. Now this sankirtana movement has already been started by the International Society for Krishna Consciousness. people should take advantage of this great sacrifice and join in the Societys activities; then there will be no scarcity. If sankirtana-yajna is performed, there will be no difficulty, not even in industrial enterprises. Therefore this system should be introduced in all spheres of lifesocial, political, industrial, commercial, etc. Then everything will run very peacefully and smoothly.