Drop by drop wears away the stone.
More French Proverbs:
The fox thinks everybody eats poultry like himself.French
He who has two women loses his soul; he who has two houses loses his mind.
French
The devil was so fond of his children that he plucked out their eyes.
French
Fair is he that comes, but fairer he that brings.
French
The dog gets into the mill under cover of the ass.
French
Vanity has no greater foe than vanity.
French