“The only teacher that's worth anything to you is your enemy.”
Source: Xenocide
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Orson Scott Card 586
American science fiction novelist 1951Related quotes

Fini: un gay non puo' fare il maestro http://archiviostorico.corriere.it/1998/aprile/09/Fini_gay_non_puo_fare_co_0_9804094008.shtml, Il Corriere della Sera, 9 April 1998.

“Anything that doesn't take years of your life and drive you to suicide hardly seems worth doing.”
The Wall Street Journal, November 20, 2009, "Hollywood's Favorite Cowboy" http://online.wsj.com/article/SB10001424052748704576204574529703577274572.html by John Jurgensen <!--accessed: November 17, 2009-->
Variant: I’m not interested in writing short stories. Anything that doesn’t take years of your life and drive you to suicide hardly seems worth doing.
Context: I'm not interested in writing short stories. Anything that doesn't take years of your life and drive you to suicide hardly seems worth doing.

Advice to the Youth of Mississippi (31 December 1964) http://www.britannica.com/blackhistory/article-9399834
Variant: You get freedom by letting your enemy know that you'll do anything to get your freedom; then you'll get it. It's the only way you'll get it.
Context: You get freedom by letting your enemy know that you'll do anything to get your freedom; then you'll get it. It's the only way you'll get it.

“Your enemies can kill you, but only your friends can hurt you.”
“The only genius that's worth anything is the genius for hard work.”