Learning the Science of the Soul
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turned into fire by constant association with fire. Similarly, detachment from material activities can be effected by spiritual activities, not by material inertia. Material inertia is the negative side of material action, but spiritual activity is not only the negation of material action but the activation of our real life. We must be anxious to search out eternal life, or spiritual existence in Brahman, the Absolute. The eternal kingdom of Brahman is described in the  Bhagavad-gītā  as that eternal country from which no one returns. That is the kingdom of God.
The beginning of our present material life cannot be traced, nor is it necessary for us to know how we became conditioned in material existence. We have to be satisfied with the understanding that somehow or other this material life has been going on since time immemorial and now our duty is to surrender unto the Supreme Lord, who is the original cause of all causes. The preliminary qualification for going back to Godhead is given in the  Bhagavad-gītā  [15.5]: “One who is free from illusion, false prestige, and false association, who understands the eternal, who is done with material lust and is free from the duality of happiness and distress, and who knows how to surrender unto the Supreme Person attains that eternal kingdom.”
One who is convinced of his spiritual identity and is freed from the material conception of existence, who is free from illusion and is transcendental to the modes of material nature, who constantly engages in understanding spiritual knowledge and who has completely severed himself from sense enjoyment can go back to Godhead. Such a person is called  amūḍha , as distinguished from  mūḍha , or the foolish and ignorant, for he is freed from the duality of happiness and distress.
And what is the nature of the kingdom of God? It is described in the  Bhagavad-gītā  [15.6] as follows: “That abode of Mine is not illumined by the sun or moon, nor by electricity. One who reaches it never returns to this material world.”
Although every place in the creation is within the kingdom of God because the Lord is the supreme proprietor of all planets, there is still the Lord’s personal abode, which is completely different from the universe in which we are now living. And this abode is called  paramam , or the supreme abode. Even on this earth there are countries where the standard of living is high and countries where the standard of living is low. Besides this earth, there are innumerable other planets distributed all over the universe, and some are considered superior places and some inferior places. In any case, all planets within the jurisdiction of the external energy, material nature, require the rays of a sun or the light of fire