“Digital files cannot be made uncopyable, any more than water can be made not wet.”
The Futility of Digital Copy Prevention, Schneier, Bruce, 2001-05-15, Cryptogram newsletter, 2006-09-08 http://www.schneier.com/crypto-gram-0105.html#3,
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Bruce Schneier 24
American computer scientist 1963Related quotes
Source: The Flame Trees of Thika: Memories of an African Childhood

The Roycraft Dictionary and Book of Epigrams (1923)

“Is it made with Liffey water?”
Said about a pint Guinness at the Guinness Storehouse in Dublin, as quoted in "‘Is it made with Liffey water?’ Philip enquires of Guinness" in Irish Independent http://www.independent.ie/irish-news/is-it-made-with-liffey-water-philip-enquires-of-guinness-26733840.html (18 May 2011)

“These reasons made his mouth to water.”
Canto III, line 379
Source: Hudibras, Part I (1663–1664)

“Winds and waters keep
A hush more dead than any sleep.”
Ruined Chapel; reported in Bartlett's Familiar Quotations, 10th ed. (1919).

“The digital revolution is far more significant than the invention of writing or even of printing.”