“The very word "secrecy" is repugnant in a free and open society; and we are as a people inherently and historically opposed to secret societies, to secret oaths and to secret proceedings.”
1961, Address to ANPA
Context: The very word "secrecy" is repugnant in a free and open society; and we are as a people inherently and historically opposed to secret societies, to secret oaths and to secret proceedings. We decided long ago that the dangers of excessive and unwarranted concealment of pertinent facts far outweighed the dangers which are cited to justify it. Even today, there is little value in opposing the threat of a closed society by imitating its arbitrary restrictions. Even today, there is little value in insuring the survival of our nation if our traditions do not survive with it. And there is very grave danger that an announced need for increased security will be seized upon by those anxious to expand its meaning to the very limits of official censorship and concealment. That I do not intend to permit to the extent that it is in my control. And no official of my Administration, whether his rank is high or low, civilian or military, should interpret my words here tonight as an excuse to censor the news, to stifle dissent, to cover up our mistakes or to withhold from the press and the public the facts they deserve to know.
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John F. Kennedy 469
35th president of the United States of America 1917–1963Related quotes
Source: Gibbon's Decline & Fall (1996), Chapter 5 (p. 96)

“Every generation is its own secret society.”
Source: Green Mars (1993), Chapter 9, “The Spur of the Moment” (p. 480)

“The A∴A∴ must rank as the most secretive secret society in the world.”
On conspiracy theories involving the A<big><big>∴</big></big>A<big><big>∴</big></big>, and the leader, known only by the initials V.V.V.V.V., in A<big><big>∴</big></big>A<big><big>∴</big></big>, p. 21 - 22
Everything Is Under Control (1998)
Context: The A∴A∴ must rank as the most secretive secret society in the world. Perhaps nobody, not even the few writers who have discussed it, knows for sure when the A∴A∴ began, which group claiming to be the A∴A∴ at present is the real A∴A∴, or even what the symbols A∴A∴ stand for — although many claim to know these things of course. … Occult historians generally agree that V. V. V. V. V. signified Vi Veri Vniversum Vivus Vici ("By the force of truth I have conquered the universe"), one of the eleven magic mottoes of Aleister Crowley.

“The art of the parenthesis is one of the great secrets of eloquence in Society.”
L’art de la parenthèse est un des grands secrets de l’éloquence dans la Société.
Maximes et Pensées, #243
Maximes and Thoughts, #243

“The secret is the secret. Sincerity is the word.”
Breed the Unmentioned (1985)
Art History And Class Struggle (1978)

“She had a passion for secrecy, but she herself was merely a Sphinx without a secret.”

Dijkstra (1996) "The next fifty years" https://www.cs.utexas.edu/users/EWD/transcriptions/EWD12xx/EWD1243a.html (EWD 1243a).
1990s

“People are secretive when they have secrets.”
Source: The Secret Life of Prince Charming