Verdict
It is not in Carl Gustav Jung's work
Attributed to Jung on social media since the 2010s without any reference; it does not appear in the collected works, letters or memoirs, and its voluntarist tone contradicts his emphasis on the weight of the unconscious.
Source: Jung, C. G. The Collected Works of C. G. Jung. Ed. Herbert Read, Michael Fordham, Gerhard Adler y William McGuire; trad. R. F. C. Hull. 20 vols. Princeton: Princeton University Press (Bollingen Series XX) / Londres: Routledge & Kegan Paul, 1953–1979. Ed. alemana: Gesammelte Werke, Olten/Zúrich: Walter-Verlag, 1958–1994.
What they did say
Verified words of Carl Gustav Jung
«My life is a story of the self-realization of the unconscious.»
Erinnerungen, Träume, Gedanken (1962), prólogo, primera frase
«I don't need to believe. I know.»
Entrevista «Face to Face», BBC, 1959, respuesta a John Freeman sobre si creía en Dios
«The only real danger that exists is man himself.»
Entrevista «Face to Face», BBC, 1959
