Introduction
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were his brothers, nephews, brothers-in-law, grandfathers and so on. He was thinking in this way to satisfy his bodily demands.  Bhagavad-gītā  was spoken by the Lord just to change this view, and at the end Arjuna decides to fight under the directions of the Lord when he says, “ kariṣye vacanaṁ tava. ” “I shall act according to Thy word.”
In this world man is not meant to toil like hogs. He must be intelligent to realize the importance of human life and refuse to act like an ordinary animal. A human being should realize the aim of his life, and this direction is given in all Vedic literatures, and the essence is given in  Bhagavad-gītā . Vedic literature is meant for human beings, not for animals. Animals can kill other living animals, and there is no question of sin on their part, but if a man kills an animal for the satisfaction of his uncontrolled taste, he must be responsible for breaking the laws of nature. In the  Bhagavad-gītā  it is clearly explained that there are three kinds of activities according to the different modes of nature: the activities of goodness, of passion and of ignorance. Similarly, there are three kinds of eatables also: eatables in goodness, passion and ignorance. All of this is clearly described, and if we properly utilize the instructions of  Bhagavad-gītā , then our whole life will become purified, and ultimately we will be able to reach the destination which is beyond this material sky.
That destination is called the  sanātana  sky, the eternal spiritual sky. In this material world we find that everything is temporary. It comes into being, stays for some time, produces some by-products, dwindles and then vanishes. That is the law of the material world, whether we use as an example this body, or a piece of fruit or anything. But beyond this temporary world there is another world of which we have information. This world consists of another nature which is  sanātana , eternal.  Jīva  is also described as  sanātana , eternal, and the Lord is also described as  sanātana  in the Eleventh Chapter. We have an intimate relationship with the Lord, and because we are all qualitatively one—the  sanātana-dhāma , or sky, the  sanātana  Supreme Personality and the  sanātana  living entities—the whole purpose of  Bhagavad-gītā  is to revive our  sanātana  occupation, or  sanātana-dharma , which is the eternal occupation of the living entity. We are temporarily engaged in different activities, but all of these activities can be purified when we give up all these temporary activities and take up the activities which are prescribed by the Supreme Lord. That is called our pure life.
The Supreme Lord and His transcendental abode are both  sanātana , as are the living entities, and the combined association of the Supreme Lord and the living entities in the  sanātana  abode is the perfection of human