Meaning
To prove one's honest intentions and sincerity in an action or agreement.
Cultural Background
In French law, 'la bonne foi' is a cardinal principle. Article 1104 of the Civil Code states that contracts must be negotiated, formed, and performed in good faith. The concept is equally strong in Quebec's civil law, often used in consumer protection cases to defend the 'vulnerable' party. In many West African cultures, 'la parole' (the word) is sacred. Démontrer sa bonne foi often involves communal witnesses or symbolic gestures. In international organizations like the UN (where French is an official language), this phrase is used to describe 'Confidence Building Measures' (CBMs).
Use with 'En'
Always follow the phrase with 'en' + a verb ending in -ant (gerund) to explain exactly HOW you are proving your sincerity.
Avoid 'Le'
Never say 'démontrer le bonne foi'. It must always have a possessive (ma, ta, sa) or be 'faire preuve de bonne foi'.
Meaning
To prove one's honest intentions and sincerity in an action or agreement.
Use with 'En'
Always follow the phrase with 'en' + a verb ending in -ant (gerund) to explain exactly HOW you are proving your sincerity.
Avoid 'Le'
Never say 'démontrer le bonne foi'. It must always have a possessive (ma, ta, sa) or be 'faire preuve de bonne foi'.
The Sartre Connection
If you use the opposite 'mauvaise foi', you are making a very strong moral judgment in France. Use it sparingly!
Test Yourself
Complétez avec l'adjectif possessif correct.
Nous voulons démontrer ___ bonne foi aux investisseurs.
The subject is 'Nous', so the possessive must be 'notre'.
Quelle phrase est correcte ?
L'avocat a dit que...
'Foi' is feminine singular.
Associez l'action à l'intention de démontrer sa bonne foi.
Action : Envoyer un remboursement avant d'être sollicité.
Proactive reimbursement is a classic sign of honest intent.
Complétez le dialogue de manière logique.
A: Je ne te crois pas. B: ________, je vais te montrer tous mes e-mails.
Showing emails is a way to prove sincerity.
🎉 Score: /4
Visual Learning Aids
Practice Bank
4 exercisesNous voulons démontrer ___ bonne foi aux investisseurs.
The subject is 'Nous', so the possessive must be 'notre'.
L'avocat a dit que...
'Foi' is feminine singular.
Action : Envoyer un remboursement avant d'être sollicité.
Proactive reimbursement is a classic sign of honest intent.
A: Je ne te crois pas. B: ________, je vais te montrer tous mes e-mails.
Showing emails is a way to prove sincerity.
🎉 Score: /4
Frequently Asked Questions
10 questions'Démontrer' is slightly more formal and suggests a logical sequence of actions. 'Prouver' is more direct and common in legal settings.
No, for religious faith you would just say 'sa foi'. 'Bonne foi' is strictly about sincerity and honesty.
The phrase itself is already feminine. 'Foi' is a feminine noun.
The opposite is 'la mauvaise foi'.
Yes, it is extremely common in business emails and negotiations to build trust.
Only if you are talking about your religious beliefs. For sincerity, you MUST include 'bonne'.
No, it's quite formal. In slang, people might say 'être carré' or 'pas de mytho'.
Only if the main verb requires it, e.g., 'Il faut que je démontre ma bonne foi'.
Yes, especially when trying to repair trust after a misunderstanding.
'Honnêteté' is a general trait; 'bonne foi' is specifically about your intentions in a particular interaction.
Related Phrases
Agir de bonne foi
similarTo act in good faith
Être de mauvaise foi
contrastTo be insincere or dishonest
Faire preuve de
builds onTo show/display a quality
Un gage de bonne foi
similarA token of good faith
