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It is indeed the boundary of life, beyond which we are not to pass; which the law of nature has pitched for a limit not to be exceeded.

Michel de Montaigne (1853). “The Works of Michael de Montaigne: Comprising His Essays, Letters, and Journey Through Germany and Italy. With Notes from All the Commentators, Biographical and Bibliographical Notices &c., &c”, p.151
It is indeed the boundary of life, beyond which we are not to pass; which the law of nature has pitched for a limit not to be exceeded.