“Sanity - a trick of agreement”

Source: The Politics of Experience (1967), p. 58
Context: Long before a thermonuclear war can come about, we have had to lay waste our own sanity. We begin with the children. It is imperative to catch them in time. Without the most thorough and rapid brainwashing their dirty minds would see through our dirty tricks. Children are not yet fools, but we shall turn them into imbeciles like ourselves, with high I. Q. s if possible.
From the moment of birth, when the Stone Age baby confronts the twentieth-century mother, the baby is subjected to these forces of violence, called love, as its mother and father, and their parents and their parents before them, have been. These forces are mainly concerned with destroying most of its potentialities, and on the whole this enterprise is successful.

Source: The Artist's Way

Source: 1984

Source: Options

Louise Bourgeois, "Art is a Guaranty of Sanity," title of 2000 drawing, Pencil on pink paper, 27.9 x 21.5 cm. Collection Museum of Modern Art, New York
Also found elsewhere as "Art is a guarantee(sic) of sanity, that is the most important thing I have said."
Variant: Art is a Guaranty of Sanity.

Voices of Vision: Creators of Science Fiction and Fantasy, page 182 https://books.google.com/books/about/Voices_of_Vision.html?id=Nu4vUZT-7ToC&hl=en
Source: Strange Wine

Source: Pincher Martin