In man, as in the brute which does not think, the certainty that springs from his inmost consciousness that he himself is Nature, the world, predominates as a lasting frame of mind
 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 certainty consciousness
Date 1819
Language English
Reference
Note Translated by R. B. Haldane and J. Kemp
Weblink http://www.gutenberg.org/files/38427/38427-h/38427-h.html

Context

“Man alone carries about with him, in abstract conceptions, the certainty of his death; yet this can only trouble him very rarely, [pg 363] when for a single moment some occasion calls it up to his imagination. Against the mighty voice of Nature reflection can do little. In man, as in the brute which does not think, the certainty that springs from his inmost consciousness that he himself is Nature, the world, predominates as a lasting frame of mind; and on account of this no man is observably disturbed by the thought of certain and never-distant death, but lives as if he would live for ever. Indeed this is carried so far that we may say that no one has really a lively conviction of the certainty of his death, otherwise there would be no great difference between his frame of mind and that of a condemned criminal.” source