It seems you are looking for a PDF of the French text Les Prodigieuses Victoires de la Psychologie Moderne (often translated as The Prodigious Victories of Modern Psychology ), specifically referencing a "6" (likely volume 6 or chapter 6).

This is a well-known work by the French author Émile Coué (1857–1926), the founder of the method of autosuggestion known as "La méthode Coué." His most famous book is La Maîtrise de Soi-même par l'Autosuggestion Consciente , but Les Prodigieuses Victoires de la Psychologie Moderne is another title associated with his teachings.