
"Man's Future in Space", (1981), essay reprinted in The Maker of Dune : Insights of a Master of Science Fiction (1987), edited by Tim O'Reilly
General sources
as quoted in " Students should rebel, challenge status quo to innovate, says Prakash Javadekar http://timesofindia.indiatimes.com/india/Students-should-rebel-challenge-status-quo-to-innovate-says-Prakash-Javadekar/articleshow/53098941.cms", Times of India (07 July 2016)
"Man's Future in Space", (1981), essay reprinted in The Maker of Dune : Insights of a Master of Science Fiction (1987), edited by Tim O'Reilly
General sources
the answer escapes us.
The Heavenly City of the Eighteenth-century Philosophers (1932)
“Asking what the question is, and why the question is asked, is always asking a pertinent question.”
Source: Philosophy and Real Politics (2008), p. 17.