object of responsibility

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She was mine, more abso- lutely mine for possession and care than anything in the world; an object of responsibility and de- votion.
Human existence, which is the primary object of responsibility,' has the precarious, vulnerable, and revocable character, the peculiar mode of transience, of all life, which makes it alone a proper object of `caring.
Why is the primary object of responsibility to preserve the possibility of being responsible in the world?

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