"Jean qui grogne et Jean qui rit" by comtesse de Sophie Ségur is a novel published in 1865. Two cousins, Jean and Jeannot, leave Brittany to seek work in Paris. Jean's cheerful and compassionate nature wins him affection and respect, while Jeannot's bitter disposition leads him down a darker path despite help from his cousin and benefactors. The story contrasts the wholesome countryside with the corrupting influence of the city, exploring whether moral choices stem from upbringing or something deeper within.