Which quote helps the author to refine the claim that optimistic people should also be realistic?
O "The will to be happy animates alike the philosopher, the prince and the chimney sweep."
(paragraph 1)
O "It is curious to observe what different ideals of happiness people cherish, and in what singular
places they look for this wellspring of their lives." (paragraph 2)
O "Most people measure their happiness in terms of physical pleasure and material possessions."
(paragraph 3)
O "A man must understand evil and be acquainted with sorrow before he can declare himself an
optimist and expect others to believe that he has reason for the faith that is in him." (paragraph
7