The progress of science in furnishing the government with means of espionage is not likely to stop with wire tapping. Ways may some day be developed by which the government, without removing papers from secret drawers, can reproduce them in court, and by which it will be enabled to expose to a jury the most intimate occurrences of the home. Advances in the psychic and related sciences may bring means of exploring unexpressed beliefs, thoughts and emotions. 'That places the liberty of every man in the hands of every petty officer' was said by James Otis of much lesser intrusions than these.
Louis D. BrandeisThe constitutional right of free speech has been declared to be the same in peace and war. In peace, too, men may differ widely as to what loyalty to our country demands, and an intolerant majority, swayed by passion or by fear, may be prone in the future, as it has been in the past, to stamp as disloyal opinions with which it disagrees.
Louis D. Brandeis