“Without the laughter, there would be no Tao.”
Source: Tao Te Ching, Ch. 41
Context: Scholars of the highest class, when they hear about the Tao, take it and practice it earnestly.
Scholars of the middle class, when they hear of it, take it half earnestly.
Scholars of the lowest class, when they hear of it, laugh at it.
Without the laughter, there would be no Tao.
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Laozi 79
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“A day without laughter is a day wasted.”
Widely attributed to Chaplin and a few others, research done for "A Day Without Laughter is a Day Wasted" at Quote Investigator http://quoteinvestigator.com/2011/07/16/laughter-day/ indicate that such expressions date back to that of Nicolas Chamfort, published in "Historique, Politique et Litteraire, Maximes détachées extraites des manuscrits de Champfort" Mercure Français (18 July 1795), p. 351 http://books.google.com/books?id=N3tBAAAAcAAJ&q=%22pas+ri%22#v=snippet&q=%22pas%20ri%22&f=false: La plus perdue de toutes les journées est celle où l’on n’a pas ri. Translations of this into English have been found as early as one in "Laughing" in Flowers of Literature (1803) by F. Prevost and F. Blagdon :
: I admire the man who exclaimed, “I have lost a day!” because he had neglected to do any good in the course of it; but another has observed that “the most lost of all days, is that in which we have not laughed;” and, I must confess, that I feel myself greatly of his opinion.
Misattributed

“Laughter would be bereaved if snobbery died.”
As quoted in The Observer (13 March 1955)

“To say more than this would only cause weeping and laughter.”
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Context: In my youth I committed black deeds. In maturity I practised innocence. Now, released from both good and evil, I have destroyed the root of karmic action and shall have no reason for action in the future. To say more than this would only cause weeping and laughter. What good would it do to tell you? I am an old man. Leave me in peace.