“He that uses his words loosely and unsteadily will either not be minded or not understood.”
Book III, Ch. 10, sec. 31
An Essay Concerning Human Understanding (1689)
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John Locke 144
English philosopher and physician 1632–1704Related quotes

On Kesey's coining of the phrase "on the bus", in The Electric Kool-Aid Acid Test (1968), Ch. VI : The Bus; as Paul Grushkin reports, in Dead Letters: The Very Best Grateful Dead Fan Mail (2011), p. 120, the statement became a famous evocation of an attitude:
The phrase became a metaphor for 1960s culture rethinking — if you were "on the bus" you were "with it."
The Electric Kool-Aid Acid Test (1968)

Letter to his son, John Quincy Adams (13 November 1816)
1810s
Source: The Letters of John and Abigail Adams

Speech in the House of Commons, July 7, 1926 "Emergency Services" http://hansard.millbanksystems.com/commons/1926/jul/07/emergency-services#column_2218 ; at this time, Churchill was serving as Chancellor of the Excheqer under Prime Minister Stanley Baldwin.
Threatening the Labour Party and trade union movement with a return of the Government-published newspaper he edited during that May's General Strike.
Early career years (1898–1929)
“I aimed at his back and pulled the trigger five times and all hell broke loose in my mind.”
Mark Chapman http://news.bbc.co.uk/1/hi/entertainment/940986.stm

“Trump is a fascist. And that’s not a term I use loosely or often. But he’s earned it.”
Max Boot, Twitter https://www.washingtonpost.com/opinions/donald-trump-isnt-todays-wendell-willkie-hes-todays-benito-mussolini/2015/12/08/77c81b0c-9ddc-11e5-a3c5-c77f2cc5a43c_story.html (2015)

Anti-Religious Thought In The Eighteenth Century http://www.cse.dmu.ac.uk/~mward/gkc/books/anti_religious_thought.txt; first published in "An Outline of Christianity : The Story of our Civilization", Vol. IV, Christianity and Modern Thought (1926)