Anyone who wants to approach the Supreme of all the Personalities of Godhead, on the Krsnaloka planet in the spiritual sky, and be intimately connected with the Supreme Personality, Krsna, must take this formula, as is stated by the Supreme Himself. Therefore, this verse is considered to be the essence of Bhagavad-gita. The Bhagavad-gita is a book directed to the conditioned souls, who are engaged in the material world with the purpose of lording it over nature and who do not know of the real, spiritual life. The Bhagavad-gita is meant to show how one can understand his spiritual existence and his eternal relationship with the Supreme Spiritual Personality and to teach one how to go back home, back to Godhead. Now here is the verse which clearly explains the process by which one can attain success in his spiritual activity: devotional service. As far as work is concerned, one should transfer his energy entirely to Krsna conscious activities. No work should be done by any man except in relationship to Krsna. This called Krsna-karma. One may be engaged in various activities, but one should not be attached to the result of his work, but the result should be done for Him. For example, one may be engaged in business, but to transform that activity into Krsna consciousness, one has to do business for Krsna. If Krsna is the proprietor of the business, then Krsna should enjoy the profit of the business. If a businessman is in possession of thousands and thousands of dollars, and if he has to offer all this to Krsna, he can do it. This is work for Krsna. Instead of constructing a big building for his sense gratification, he can construct a nice temple for Krsna, and he can install the Deity of Krsna and arrange for the Deity's service, as is outlined in the authorized books of devotional service. This is all Krsna-karma. One should not be attached to the result of his work, but the result should be offered to Krsna. One should also accept as prasadam, food, the remnants of offerings to Krsna. If, however, one is not able to construct a temple for Krsna, one can engage himself in cleansing the temple of Krsna; that is also Krsna-karma. One can cultivate a garden. Anyone who has land-in India, at least, any poor man has a certain amount of land-can utilize that for Krsna by growing flowers to offer Him. He can sow tulasi plants because tulasi leaves are very important, and Krsna has recommended this in Bhagavad-gita. Krsna desires that one offer Him either a leaf, or a flower, or a little water-and He is satisfied. This leaf especially refers to the tulasi So one can sow tulasi leaves and pour water on the plant. Thus, even the poorest man can engage in the service of Krsna. These are some of the examples of how one can engage in working for Krsna.