“And perhaps there is no advice to give a writer more important than this: — Never write anything that does not give you great pleasure.”
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Joseph Joubert 253
French moralist and essayist 1754–1824Related quotes

“A fop sometimes gives important advice.”
Un fat quelquefois ouvre un avis important.
Canto IV, l. 50
The Art of Poetry (1674)

“I wish to God that you had as much pleasure in following my advice, as I have in giving it to you.”
5 February 1750
Letters to His Son on the Art of Becoming a Man of the World and a Gentleman (1774)

“To profit from good advice requires more wisdom than to give it.”

Source: Elmore Leonard's 10 Rules of Writing

On drug dealing, quoted in The Daily Telegraph (1964)
“Does that remind you of anything? No? Give up?”
1993/6
Misc

“There is no sweeter pleasure than to surprise a man by giving him more than he hopes for.”
Il n'est pas de plaisir plus doux que de surprendre un homme en lui donnant plus qu'il n'espère.
XXVIII: "La Fausse Monnaie" http://fr.wikisource.org/wiki/Petits_Po%C3%A8mes_en_prose_-_XXVIII._La_Fausse_Monnaie
Le Spleen de Paris (1862)