Just like every night we die. The gross body remains inactive while we are sleeping, and the subtle body takes me away. I dream, I go in the dreamland. I have gone to some friend, I am talking with somebody, I am working in a different way. That is our daily experience. This means that we have got two kinds of body. One body is this gross body, and the other body is subtle body, made of mind, intelligence, and ego. So foolish person, they do not see the subtle body, but the subtle body is there. Everyone will accept. I am working with my mind, intelligence and ego. Everyone knows. So although we cannot see the subtle body, it is there. So death means this gross body, this overcoat is left, and I am carried away by the subtle body, and I enter into another overcoat, or gross body. So practically this is called death. Because we have no vision of the subtle body, how the soul is being transferred or transmigrating from one gross body to another gross body, keeping the subtle body intact. And the subtle body is given up when one is liberated. And at that time he goes, when he is liberated, freed from this subtle body also, at that time he is promoted to the spiritual kingdom in spiritual body. Therefore while living in this gross body, we have to educate our subtle body in such a way that it becomes spiritualized completely.
The subtle body is mind, intelligence and ego. So if we think of Krsna in the mind, always, and if we work intelligently for Krsna, that is mind and intelligence. And if we change our false ego, ego means, "I am." So I am at the present moment thinking, "I am American," "I am Indian," "I am white," "I am black," like that. "I am human being," "I am animal," "I am cat or dog," so many things, "I am." This "I am" has to be changed. I am eternal servant of Krsna. In this way, if you educate or transfer the activities of the subtle body, mind, intelligence, and ego, then, at the time of death, you give up this subtle body, material subtle body, mind, intelligence, and ego, and by your spiritual body you go back to home, back to Godhead. This is called Krsna consciousness movement. Gross body, automatically we give up. Now, we should practice to give up the subtle body. To give up this subtle body, one has to develop love for God, prema. And the process is, how to give up the subtle body.
So, Ultimate transmigration means go back to home, back to Godhead. That should be the actual aim of life. That is first class intelligent. But they do not know. Therefore we are trying to render our humble service to the human society, to give this information, that "You are trying for so many things for becoming happy, but instead of being happy, you are becoming hippie. So please take this Krsna consciousness and actually you will be happy."
- Srila Prabhupada