The karma-yogī can help revive this transcendental relationship of the living spirit with Kṛṣṇa as His eternal servitor. And the karma-yogī renders this immense benefit to the ordinary living entities-who are entirely addicted to mundane activities—without disturbing them in their ordinary engagements. In fact, the Bhagavad-gītā advises that in the interest of the mundane workers, they should not be restrained from their ordinary engagements; on the contrary, they may be encouraged to stay engaged in that way, within the process of karma-yoga, or work with transcendental results.
Ordinarily, these mundaners cannot easily understand their eternal relationship with Kṛṣṇa. Instead, they themselves have posed as Kṛṣṇa, under the false inducement of the illusory energy. This false position of supreme enjoyer gives them much trouble as they search for lordship over the powers of nature, but still these mundaners cannot give up the spirit of lording it over. And when they pretend to give up the enjoying spirit, under the pressure of disappointment and frustration, they usually take shelter of pseudo renunciation, with an even greater spirit of enjoyment. The mundane workers, who are always desirous of enjoying the fruits of their mundane activities, suffer greatly under the pressing disadvantages of such activities, just like poor oxen tightly tethered to the grinding mill. But under a false pretense of "enjoyer" dictated by the illusory energy, they think themselves to be really enjoying. Therefore, the learned karma-yogīs tactfully engage such foolish mundaners in the respective works for which they have special attachments—but in relation with Kṛṣṇa—without disturbing them in their general activities. For this purpose only, the learned and liberated souls who are eternal servitors of Kṛṣṇa sometimes remain in the midst of ordinary activities, just to attract the foolish mundaners to the process of karma-yoga.
The foolish mundaners would have been left perpetually in the darkness of foolish activities if Śrī Kṛṣṇa, the Personality of Godhead, or His eternal associates, such as Marshal Arjuna, had not kindly taken the trouble of initiating the process of karma-yoga by the direct method of personal example. The foolish mundaners are unable to come to an awareness of the immeasurable difficulties that confront them in pursuance of their foolish mundane activities. However much they may bewilder themselves by the conception of lordship over their various actions, they are always being driven under the direction of the modes of nature—that is the considered verdict of Śrī Kṛṣṇa, the Personality of Godhead, in the Bhagavad-gītā. He says that the foolish mundaner considers himself the author or doer of all his activities by a sense dictated by his false egoism, without knowing that it is the modes of nature that lead him to do everything in all his engagements. The foolish mundaner cannot understand that he is under the spell of Lord Kṛṣṇa's illusory energy, Maya-devi, who has made the mundaner bound to do as she desires. Consequently, the foolish mundaner enjoys only the temporary results of his activities—fleeting mundane happiness or distress—and undergoes a severe penalty of servitude dictated by the modes of nature.
In Bhagavad-gītā Lord Kṛṣṇa affirms that each and every living entity that be is His part and parcel, and as such, each and every living entity is His eternal, transcendental servitor. The natural position of one who is part and parcel is to render service to the complete whole. In Hitopadeśa, a Vedic book of ancient fables, there is a lucid analogy entitled Uddeśa Indriyāṇām which explains the relationship of the parts of the body to the whole. The hands, legs, eyes, nose, and so forth are all parts of the complete whole that is the body. Now if the hands, legs, eyes, nose and so on do not endeavor to provide food for the stomach, but themselves try to enjoy the eatables collected by them, then there will be a maladjustment of the whole body. The bodily parts would be working against the interest of the body as a whole. By such foolish activities, the hands, legs, and so on could never improve their respective positions, but on the contrary, for want of sufficient nourishment of the whole body through the medium of the stomach, the whole system of bodily structure and function would become weakened, deteriorated, and diseased.
The Personality of Godhead is the original cause of all causes, and He is the life of the whole creation. The Supreme Personality of Godhead, Śrī Kṛṣṇa, is the root of the tree of the whole creation. That is the statement of Bhagavad-gītā. It is also said in Bhagavad-gītā that there is no person superior to Śrī Kṛṣṇa Himself. He is the supreme enjoyer of all sacrifices and activities. But still, those who are utterly sinful do not surrender unto Him, even though He is the Supreme Personality of Godhead and all other living beings are His transcendental, eternal servitors, part and parcel of Him.