Too much zeal spoils all.
More French Proverbs:
Bear wealth, poverty will bear itself.French
The list is worse than the cloth.
French
Better a small fire that warms you than a big one that burns you.
French
Where the hostess is beautiful the wine is tasty.
French
A dog with a docked tail is not afraid that its backside can be seen.
French
Mother-in-law and daughter-in-law can be cooked together but they will never be tender.
French