"Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not"
About this Quote
The subtext is a swipe at intellectual vanity, especially the kind that confuses quick naming with understanding. “If a man does not know what a thing is” could be a patient, an analyst, a whole culture staring at its own symptoms. Jung’s world was full of grand systems - Freud’s drive theory, positivist science, political ideologies - each promising a clean map of the human animal. Jung answers with a method that’s closer to triangulation: you approach the psyche by testing, revising, and learning its boundaries. Knowing “what it is not” is the psychological equivalent of ruling out diagnoses, but it’s also philosophical humility: truth is approached asymptotically, through disciplined disillusionment.
Context matters because Jung made a career out of contested meanings: dreams, symbols, archetypes, the shadow. These aren’t objects you can measure and close the case on. The quote defends exploratory thinking against the demand for instant certainty. It also hints at why Jung remains culturally sticky: he gives permission to be unfinished, to treat missteps as signals from the unconscious rather than moral failures. Mistakes become not shame, but movement.
Quote Details
| Topic | Learning from Mistakes |
|---|---|
| Source | Help us find the source |
| Cite | Cite this Quote |
Citation Formats
APA Style (7th ed.)
Jung, Carl. (n.d.). Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not. FixQuotes. https://fixquotes.com/quotes/mistakes-are-after-all-the-foundations-of-truth-5307/
Chicago Style
Jung, Carl. "Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not." FixQuotes. Accessed February 3, 2026. https://fixquotes.com/quotes/mistakes-are-after-all-the-foundations-of-truth-5307/.
MLA Style (9th ed.)
"Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not." FixQuotes, https://fixquotes.com/quotes/mistakes-are-after-all-the-foundations-of-truth-5307/. Accessed 3 Feb. 2026.










