
“The language of sin was universal, the original Esperanto.”
Source: Horns
"A Philologist on Esperanto" in The British Esperantist (May 1932).
Years later, in a 1956 letter (quoted more extensively below) he stated that Esperanto and other constructed languages were "dead, far deader than ancient unused languages, because their authors never invented any Esperanto legends."
“The language of sin was universal, the original Esperanto.”
Source: Horns
“Esperanto was a very useful language, because wherever you went, you found someone to speak with.”
"How Do You Say ‘Billionaire’ in Esperanto?" in The New York Times (December 16, 2010) http://cityroom.blogs.nytimes.com/2010/12/16/how-do-you-say-billionaire-in-esperanto/
From interview with Robert Block, 1995
Interviews (1993 – 1995)
No. 180: To a Mr. Thompson (incomplete draft of a letter, 1956).
The Letters of J. R. R. Tolkien (1981)
Cut down the proud towering thoughts that you get into you, or see they be pure as well as high. There is a nobler ambition than the gaining of all California would be, or the getting of all the suffrages that are on the planet just now.
1860s, On The Choice Of Books (1866)
Guardian Angel, p. 220
2000s and posthumous publications, The Collected Stories of Arthur C. Clarke (2001)
Source: V. Peckhaus, "19th Century Logic between Philosophy and Mathematics," Bulletin of Symbolic Logic, 5 (1999), 433-450.