“If a warrior is not unattached to life and death, he will be of no use whatsoever. The saying that "All abilities come from one mind" sounds as though it has to do with sentient matters, but it is in fact a matter of being unattached to life and death. With such non-attachment one can accomplish any feat.”
Hagakure (c. 1716)
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Tsunetomo Yamamoto 65
Samurai 1659–1719Related quotes

“Still, no matter how commonplace, one’s death is the most interesting event of one’s life.”
Source: Immortality, Inc. (1959), Chapter 1 (p. 1)

“Therefore death is nothing to us, it matters not one jot, since the nature of the mind is understood to be mortal.”
Nil igitur mors est ad nos neque pertinet hilum,
quandoquidem natura animi mortalis habetur.
Book III, lines 830–831 (tr. Rouse)
De Rerum Natura (On the Nature of Things)

In the Encyclopaedia Britannica, Ninth edition, (1876) Vol. III, "Biology", p. 689.
Also quoted in Joseph Cook (1878), Biology, with Preludes on Current Events, Houghton, Osgood, p. 39
1870s

A Grief Observed (1961)
Context: It is hard to have patience with people who say 'There is no death' or 'Death doesn't matter.' There is death. And whatever is matters. And whatever happens has consequences, and it and they are irrevocable and irreversible. You might as well say that birth doesn't matter.

Source: The Way Towards The Blessed Life or the Doctrine of Religion 1806, P. 4