For a reasonable man can only think of himself as imperishable, because he thinks of himself as without beginning, as eternal, in fact as timeless. Whoever, on the other hand, regards himself as having become out of nothing must also think that he will again become nothing
 Arthur Schopenhauer, The World as Will and Representation (1819). copy citation

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Author Arthur Schopenhauer
Source The World as Will and Representation
Topic beginning thought
Date 1819
Language English
Reference
Note Translated by R. B. Haldane and J. Kemp
Weblink http://www.gutenberg.org/files/40868/40868-h/40868-h.html

Context

“The deep conviction of the indestructibleness of our nature through death, which, as is also shown by the inevitable qualms of conscience at its approach, every one carries at the bottom of his heart, depends altogether upon the consciousness of the original and eternal nature of our being: therefore Spinoza expresses it thus: “Sentimus, experimurque, nos æternos esse.” For a reasonable man can only think of himself as imperishable, because he thinks of himself as without beginning, as eternal, in fact as timeless. Whoever, on the other hand, regards himself as having become out of nothing must also think that he will again become nothing; for that an eternity had passed before he was, and then a second eternity had begun, through which he will never cease to be, is a monstrous thought. Really the most solid ground for our immortality is the old principle:” source