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It is indeed Tolkien speaking, though the quotation is a translation from Simone De Beauvoir's "A Very Easy Death".
A good interpretation of Tolkien's use of the quotation can be read here: http://www.lotrplaza.com/forum/forum_posts.asp?TID=230587 (Chris Seaman, Death and Language, 2002)
It is indeed Tolkien speaking, though the quotation is a translation from Simone De Beauvoir's "A Very Easy Death".
A good interpretation of Tolkien's use of the quotation can be read here: http://www.lotrplaza.com/forum/forum_posts.asp?TID=230587 (Chris Seaman, Death and Language, 2002)