Wikiquote traces the sentence through a quotation collection to Heartburn. It is a literary line, not clinical advice; the novel itself was not directly inspected.
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Evoking the world of Nora Ephron — American writer and filmmaker. Theme: "Insane people are always sure they're just fine. It's only the sane people who are willing to admit they're crazy". Atmospheric and restrained, cinematic directional light, a muted period-appropriate palette, fine grain and texture. Compose with generous empty space for the quote and a small credit line. No lettering in the image itself.
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Minimalist editorial slide for the quote "Insane people are always sure they're just fine. It's only the sane people who are willing to admit they're crazy". Clean background, a single muted accent color, generous negative space, subtle paper or linen texture, no literal illustration — let the words carry it. Reserve clear space for a serif quote and a small credit line. No lettering in the image itself.
Provenance
What the source establishes
Documented trail
Heartburn (1983), as quoted in What a Piece of Work Is Man! (1989), page 320; citation supplied by Wikiquote.
Evidence
Attribution and wording limits stated below
It’s only the sane people
A short excerpt from the cited source; it may differ from the popular wording above.
Read the source ↗ — Wikiquote traces the sentence through a quotation collection to Heartburn. It is a literary line, not clinical advice; the novel itself was not directly inspected.
The cited novel was published in 1983. Its English wording remains under copyright.
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Nora Ephron is identified in the cited material as the american writer and filmmaker. This page distinguishes the documented source trail from a claim of verbatim personal testimony.
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The primary source (Chicago)
Heartburn (1983), as quoted in What a Piece of Work Is Man! (1989), page 320; citation supplied by Wikiquote.
This verification page
Quotle.info. “Who really said ‘Insane people are always sure they're just fine. It's only the sane people who are willing to admit they're crazy’?” Last verified 9 Nov 2026. https://quotle.info/who-said/insane-people-are-always-sure-theyre-just-fine-its-only-the/