Source: "Foundations of the Theory of Signs," 1938, p. 43
“Since the term command comprises the term law the first is the simpler as well as the larger of the two. But simple as it is, it admits of explanation. And, since it is the key to the sciences of jurisprudence and morals, its meaning should be analyzed with. precision.”
Source: The Province of Jurisprudence Determined (1832), p. 6
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John Austin (legal philosopher) 6
legal philosopher 1790–1859Related quotes

Source: 1930s, "Protocol Statements" (1932), p. 91

Source: Facets of Systems Science, (2001), p. 4.

Letter to General Alexander Smyth, on the book of Revelation (or The Apocalypse of St. John the Divine) (17 January 1825) http://www.cbsnews.com/stories/2005/02/04/opinion/main671823.shtml
1820s
Martin Op 't Land, Erik Proper (2009) Enterprise Architecture: Creating Value by Informed Governance. p. 26-27

News Conference of (11 August 1954) http://www.presidency.ucsb.edu/ws/print.php?pid=9977
Variant: When people speak to you about a preventive war, you tell them to go and fight it. After my experience, I have come to hate war. War settles nothing.
Quoted in Quote magazine (4 April 1965) and The Quotable Dwight D. Eisenhower (1967) edited by Elsie Gollagher, p. 219<!-- seldom found variants: All of us have heard this term 'preventative war' since the earliest days of Hitler. I recall that is about the first time I heard it. In this day and time... I don't believe there is such a thing; and, frankly, I wouldn't even listen to anyone seriously that came in and talked about such a thing.
A preventative war, to my mind, is an impossibility. I don't believe there is such a thing, and frankly I wouldn't even listen to anyone seriously that came in and talked about such a thing.-->
1950s
Context: All of us have heard this term "preventive war" since the earliest days of Hitler. I recall that is about the first time I heard it. In this day and time, if we believe for one second that nuclear fission and fusion, that type of weapon, would be used in such a war — what is a preventive war?
I would say a preventive war, if the words mean anything, is to wage some sort of quick police action in order that you might avoid a terrific cataclysm of destruction later.
A preventive war, to my mind, is an impossibility today. How could you have one if one of its features would be several cities lying in ruins, several cities where many, many thousands of people would be dead and injured and mangled, the transportation systems destroyed, sanitation implements and systems all gone? That isn't preventive war; that is war.
I don't believe there is such a thing; and, frankly, I wouldn't even listen to anyone seriously that came in and talked about such a thing.
… It seems to me that when, by definition, a term is just ridiculous in itself, there is no use in going any further.
There are all sorts of reasons, moral and political and everything else, against this theory, but it is so completely unthinkable in today's conditions that I thought it is no use to go any further.

As quoted in Dirac: A Scientific Biography (1990), by Helge Kragh, p. 258
Source: [Kragh, Helge, Dirac: A Scientific Biography, https://books.google.co.uk/books?id=zXm1Bso1VREC&pg=PA258&lpg=PA258&dq=%22The+aim+of+science+is+to+make+difficult+things+understandable+in+a+simpler+way;+the+aim+of+poetry+is+to+state+simple+things+in+an+incomprehensible+way.+The+two+are+incompatible%22&source=bl&ots=OLeGFpZGCh&sig=VRga1I7FVl9UBpXi_oAq_-8u_ls&hl=en&sa=X&ved=0ahUKEwjBwLbbwdvVAhXIIMAKHZ_pCZQQ6AEIOTAD#v=onepage&q=%22The%20aim%20of%20science%20is%20to%20make%20difficult%20things%20understandable%20in%20a%20simpler%20way%3B%20the%20aim%20of%20poetry%20is%20to%20state%20simple%20things%20in%20an%20incomprehensible%20way.%20The%20two%20are%20incompatible%22&f=false, March 30, 1990, 258, December 6, 2017]

“I hate to use that term [iPad Killer] since the iPad is probably dead anyway.”
No Agenda podcast #177 (February 2010) http://www.noagendashow.com
2010s

http://www.epolitix.com/EN/Interviews/200508/88b20915-9848-4644-8f17-97ca62e4e341.htm