Krṣṇa's Appearances and Activities
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Krṣṇa's birth, His appearance and disappearance, are likened unto the appearance and disappearance of the sun. In the morning it appears as if the sun is born from the eastern horizon, but actually it is not. The sun is neither rising nor setting; it is as it is in its position. All risings and settings are due to the rotation of the earth. Similarly, in Vedic literatures there are prescribed schedules for the appearance and disappearance of Śrī Krṣṇa. Krṣṇa's rising is just like the sun. The sun's rising and setting are going on at every moment; somewhere in the world people are witnessing sunrise and sunset. It is not that at one point Krṣṇa is born and at another point He is gone. He is always there somewhere, but He appears to come and go. Krṣṇa appears and disappears in many universes. We only have experience of this one universe, but from Vedic literatures we can understand that this universe is but a part of the infinite manifestations of the Supreme Lord.
Although Krṣṇa is the Supreme Lord and is unborn and unchangeable, He appears in His original transcendental nature. The word  prakṛti  means "nature." In the Seventh Chapter of  Bhagavad-gītā , it is stated that there are many kinds of nature. These have been categorized into three basic types. There is external nature, internal nature and marginal nature. The external nature is the manifestation of this material world, and in the Seventh Chapter of  Bhagavad-gītā  this is described as  aparā  or material nature. When Krṣṇa appears, He accepts the higher nature ( prakṛtim svām ), not the inferior material nature. Sometimes the head of a state may go to the