Some gifts come with choices: to use them, or, not. The life that the LORD gifted to the kingdom of man was not of that sort. Once that gift was delivered, it took control of the first place of activity in the kingdom of man. Though; God did not give this gift absolute control of the kingdom of man–for, life, too, has to operate in a span. Life’s span is complete when it releases control to another of the gifts of God: death. Wait; before we answer that question you just raised, here is our introduction to death.
And the LORD God took the man, and put him into the garden of Eden to dress it and to keep it. And the LORD God commanded the man, saying, Of every tree of the garden thou mayest freely eat: But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die.
(Genesis 2:15-17)
Okay; now, back to that question. You ask why I say that, death is a gift. I say so because; in an extension of its charter, death was enlisted to deliver us into this fulfillment.
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