Comment in the 1760 manuscript of Dream of the Red Chamber, as quoted by Anthony C. Yu in Rereading the Stone (Princeton University Press, 1997), p. 7
“Persons whom I saw thirty years ago and with whom I was intimate now appear on the page, and this compels me to declare that The Story of the Stone is a book of the deepest feelings and the truest words. Unless, however, one has in fact experienced such events or been deluded by such feelings, reading it is like "chewing wax" absentmindedly, never understanding the miraculous wonders of what one has witnessed.”
Comment in the 1760 manuscript of The Story of the Stone, as quoted by Anthony C. Yu in Rereading the Stone (Princeton University Press, 1997), p. 7
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Attribution reported in Respectfully Quoted: A Dictionary of Quotations (1989), which states that this is not verified in works about him nor in Magnificent Yankee, the film about him. Holmes expressed a similar sentiment in a letter to Sir Frederick Pollock (May 24, 1929): "For sixty years she made life poetry for me". Mark De Wolfe Howe, ed., Holmes-Pollock Letters (1941), vol. 2, p. 243.
Attributions

Source: Lectures on Philosophy

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