A realistic expectation also ...

A realistic expectation also demands our acceptance that one's allotted time on earth must be limited to an allowance consistent with the continuity of our species... We die so that the world may continue to live. We have been given the miracle of life because trillions and trillions of living things have prepared the way for us and then have died-in a sense, for us. We die, in turn, so that others may live. The tragedy of a single individual becomes, in the balance of natural things, the triumph of ongoing life.
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 Sherwin B. Nuland

Quotes from the same author

The greatest dignity to be found in death is the dignity of the life that preceded it. This is a form of hope that we can all achieve, and it is the most abiding of all. Hope resides in the meaning of what our lives have been.
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 Sherwin B. Nuland
The dignity to be sought in death is the appreciation by others of what one has been in life,... that proceeds from a life well lived and from the acceptance of one's own death as a necessary process of nature.... It is also the recognition that the real event taking place at the end of our life is our death, not the attempts to prevent it.
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 Sherwin B. Nuland
Empires fall, ids explode, great symphonies are written, and behind all of it is a single instinct that demands satisfaction.
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 Sherwin B. Nuland