Th'invention all admir'd, and each, how he To be th'inventor miss'd; so easy it seem'd once found, which yet unfound most would have thought impossible.
Source: In Isaac Asimov's Book of Science and Nature Quotations, ed. Jason Shulman & Isaac Asimov, 1988.
-- John Milton, (Dec 9 1608-1674), English poet, essayist; He was a master epic poetry; Wrote in four languages including Paradise Lost, 1676, after losing his sight.