...you cannot demonstrate, prove, establish -- you cannot know if a
book is good. A sentence, a line, a phrase: nobody knows. The
literary philosophers of Cambridge spent a century saying otherwise,
and said nothing. Is "When all at once I saw a crowd" worse than
"Thoughts that do often lie too deep for tears"?
-- Martin Amis, The Information, 1995, p98.
William Wordsworth
"I Wandered Lonely as a Cloud",
"Intimations of Immortality".