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Rāja-vidyā: The King of Knowledge
cause this material world is such that in the course of time, after an adjustment is made, it will again deteriorate.
The world is so conceived that even if we make a very good arrangement, it will gradually deteriorate. After World War I an armistice was signed, and there was a short period of peace, but World War II soon came, and now that that is over they are making preparations for World War III. This is the function of time ( kāla ) in the material world. We build up a very nice house, and after fifty years it deteriorates, and after one hundred years it deteriorates even more. Similarly, when the body is young, people care for it, always lavishing affection upon it and kissing it, but when it grows old no one cares for it. This is the nature of the material world—even if a very good adjustment is made, it will in course of time be vanquished. Therefore adjustments are periodically required, and from age to age the Supreme Lord or His representative come to make adjustments in the direction of civilization. Thus Śrī Kṛṣṇa descends many times to establish or rejuvenate many different religions.