Dissenting, Olmstead v. United States, 277 U.S. 438, 479 (1928). The last sentence is one of many quotations inscribed on Cox Corridor II, a first floor House corridor, U.S. Capitol. 
Judicial opinions 
Context: The defendants' objections to the evidence obtained by wire-tapping must, in my opinion, be sustained. It is, of course, immaterial where the physical connection with the telephone wires leading into the defendants' premises was made. And it is also immaterial that the intrusion was in aid of law enforcement. Experience should teach us to be most on our guard to protect liberty when the government's purposes are beneficent. Men born to freedom are naturally alert to repel invasion of their liberty by evil-minded rulers. The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well-meaning but without understanding.
                                    
Louis Brandeis: Quotes about men
Louis Brandeis was American Supreme Court Justice. Explore interesting quotes on men.
                                        
                                        Concurring, Whitney v. California, 274 U.S. 357, 376 (1927). 
Judicial opinions
                                    
                                        
                                        Dissenting, Olmstead v. United States, 277 U.S. 438 (1928). 
Judicial opinions
                                    
                                        
                                        The Opportunity in the Law, 39 American Law Review 555, 555 (1905). 
Extra-judicial writings
                                    
                                        
                                        Dissent, Liggett Co. v. Lee, 288 U.S. 517 (1933). 
Judicial opinions
                                    
                                        
                                        Dissent, New State Ice Co. v. Liebmann, 285 U.S. 262 (1932). 
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                                        Concurring, Whitney v. California, 274 U.S. 357 (1927). 
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Albert Einstein, statement sent to the Boston journal The Jewish Advocate on 1931-10-19 on the occasion of Justice Brandeis' seventy-fifth birthday, quoted in Helen Dukas and Banesh Hoffman, eds., Albert Einstein: The Human Side (Princeton University Press, 1981), ISBN 0-691-02368-9, p. 85.
                                        
                                        Concurring, Whitney v. California, 274 U.S. 357, 375 (1927), at 375. In this case, in which the Court upheld a California anti-Communist statute, Brandeis, writing in a concurrence joined by Justice Oliver Wendell Holmes, Jr., concurred in the judgment but not in the reasoning. Whitney was later overruled (with the later Court adopting Brandeis's reasoning) in Brandenburg v. Ohio, 395 U.S.  444 (1969). 
Judicial opinions