„Clarity of text is the sole incontrovertible sign of the maturity of an idea.“

This is not a statement that has been found in any translation of any of Freud's known works. It is a paraphrase of a statement from the essay "Guns, Murders, and the Constitution" (February 1990) http://www.guncite.com/journals/gun_control_katesreal.html by Don B. Kates, Jr. where Kates summarizes his views of passages in Dreams in Folklore (1958) by Freud and David E. Oppenheim, while disputing statements by Emmanuel Tanay in "Neurotic Attachment to Guns" in a 1976 edition of The Fifty Minute Hour: A Collection of True Psychoanalytic Tales (1955) by Robert Mitchell Lindner:
:: Dr. Tanay is perhaps unaware of — in any event, he does not cite — other passages more relevant to his argument. In these other passages Freud associates retarded sexual and emotional development not with gun ownership, but with fear and loathing of weapons. The probative importance that ought to be attached to the views of Freud is, of course, a matter of opinion. The point here is only that those views provide no support for the penis theory of gun ownership.
: After reading of this essay and its citations, this paraphrase of an opinion about Freud's ideas has been attributed to Freud himself, and specifically to his 10th Lecture "Symbolism in Dreams" in General Introduction to Psychoanalysis on some internet forum pages: alt.quotations http://groups.google.com/group/alt.quotations/msg/5fc8dd0f7d56981e, uk.politics.guns http://groups.google.com/group/uk.politics.guns/msg/4ad060e213bc5b6b, talk.politics.guns http://groups.google.com/group/talk.politics.guns/msg/7fbce4b3fa5324a7, can.talk.guns http://groups.google.com/group/can.talk.guns/msg/a57bc07124e64fba , etc.
: One of the statements by Freud which Kates summarized from in Dreams in Folklore (1958), p. 33, reads: "The representation of the penis as a weapon, cutting knife, dagger etc., is familiar to us from the anxiety dreams of abstinent women in particular and also lies at the root of numerous phobias in neurotic people."
Misattributed

This is not a statement that has been found in any translation of any of Freud's known works. It is a paraphrase of a statement from the essay "Guns, Murders, and the Constitution" (February 1990) http://www.guncite.com/journals/gun_control_katesreal.html by Don B. Kates, Jr. where Kates summarizes his views of passages in Dreams in Folklore (1958) by Freud and David E. Oppenheim, while disputing statements by Emmanuel Tanay in "Neurotic Attachment to Guns" in a 1976 edition of The Fifty Minute Hour: A Collection of True Psychoanalytic Tales (1955) by Robert Mitchell Lindner:
Dr. Tanay is perhaps unaware of — in any event, he does not cite — other passages more relevant to his argument. In these other passages Freud associates retarded sexual and emotional development not with gun ownership, but with fear and loathing of weapons. The probative importance that ought to be attached to the views of Freud is, of course, a matter of opinion. The point here is only that those views provide no support for the penis theory of gun ownership.
After reading of this essay and its citations, this paraphrase of an opinion about Freud's ideas has been attributed to Freud himself, and specifically to his 10th Lecture "Symbolism in Dreams" in General Introduction to Psychoanalysis on some internet forum pages: alt.quotations http://groups.google.com/group/alt.quotations/msg/5fc8dd0f7d56981e, uk.politics.guns http://groups.google.com/group/uk.politics.guns/msg/4ad060e213bc5b6b, talk.politics.guns http://groups.google.com/group/talk.politics.guns/msg/7fbce4b3fa5324a7, can.talk.guns http://groups.google.com/group/can.talk.guns/msg/a57bc07124e64fba , etc.
One of the statements by Freud which Kates summarized from in Dreams in Folklore (1958), p. 33, reads: "The representation of the penis as a weapon, cutting knife, dagger etc., is familiar to us from the anxiety dreams of abstinent women in particular and also lies at the root of numerous phobias in neurotic people."
Misattributed

1960s, The Rising Tide of Racial Consciousnes (1960)

The Diary of Anaïs Nin, Vol. 5
Diary entries (1914 - 1974)

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The Knight’s Tale from The London Literary Gazette: 31st July 1824 Poetic Sketches - 5th Series - Sketch the Third
The Vow of the Peacock (1835)

Some Hope, Chapter 1

Earnestness
Fuente: I am That, P.124.

Fuente: Real Presences (1989), I: A Secondary City, Ch. 3 (p. 9).

In Tiger’s Eye, Vol. 1, no 9, October 1949; as quoted in Abstract Expressionism Creators and Critics, ed. Clifford Ross, Abrams Publishers New York 1990, p. 170
1940's

Fuente: Amusing Ourselves to Death: Public Discourse in the Age of Show Business

Quote in Mondrian's letter to Israel Querido, Summer of 1909; published in the weekly magazine 'De Controleur' 23 Oct, 1909; as cited in English translation, in Two Mondrian sketchbooks 1912 - 1914, ed. Robert P. Welsh & J. M. Joosten, Amsterdam 1969 p. 10
1900's

Fuente: 1930s, Adventures of Ideas (1933), p. 91.
Contexto: In the study of ideas, it is necessary to remember that insistence on hard-headed clarity issues from sentimental feeling, as if it were a mist, cloaking the perplexities of fact. Insistence on clarity at all costs is based on sheer superstition as to the mode in which human intelligence functions. Our reasoning grasps at straws for premises and float on gossamer for deductions.

"The Sport of God https://www.commondreams.org/views/2005/09/09/911-and-sport-god", speech accepting the Union Medal of the Union Theological Seminary (7 September 2005), as quoted Moyers on Democracy (2008), p. 375

Fuente: You Get So Alone at Times That it Just Makes Sense

Fuente: The Emergence Of Probability, 1975, Chapter 15, Inductive Logic, p. 139.

page 63 https://books.google.com/books?id=hwpKAAAAIAAJ&pg=PA63
Relativity for All, London, 1922

Fuente: Deep Work: Rules for Focused Success in a Distracted World