In the course of the evolutionary process, which is caused by fruitive activities due to undesirable material sense gratification, I have received this human form of life, which can lead to the heavenly planets, to liberation, to the lower species, or to rebirth among human beings. (SB7.13.25)
…All living entities within this material world are undergoing the cycle of birth and death according to the laws of nature. This struggle of birth and death in different species may be called the evolutionary process, but in the Western world it has been wrongly explained. Darwin’s theory of evolution from animal to man is incomplete because the theory does not present the reverse condition, namely evolution from man to animal.
Human life, which is obtained in the course of the evolutionary process, is a chance for elevation (svargāpavarga) or for degradation (tiraścām punar asya ca). If one uses this human form of life properly, he can elevate himself to the higher planetary systems, where material happiness is many thousands of times better than on this planet, or one may cultivate knowledge by which to become free from the evolutionary process and be reinstated in one’s original spiritual life. This is called apavarga, or liberation. (from purport to SB 7.13.25)
Some years back I was reading from one book and the author was explaining how within each of us, we have the Keys to the gates of the Kingdom of Heaven, and we also have the Keys to the gates of Hell. It is our choice at every moment which we choose to use. Or as the saying goes “It is Rama, or it is Drama”.
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