I don't pretend we have all the answers. But the questions are certainly worth thinking about.
Source: In Pearls of Wisdom, ed. J. Agel and W. Glanze, 1987.
-- Arthur C Clarke, (Dec 16 1917-2008), English science writer, science-fiction writer; He was an early advocate of space flight and cosmic unity; wrote 2001: A Space Odyssey, 1968.