Ah, Sir, a novel is a mirror carried along a high road. At one moment it reflects to your vision the azure skies, at another the mire of the puddles at your feet. And the man who carries this mirror in his pack will be accused by you of being immoral! His mirror shews the mire, and you blame the mirror! Rather blame that high road upon which the puddle lies, still more the inspector of roads who allows the water to gather and the puddle to form.

He did have influence as a literary critic. In a word in Bologna “crystallization” has not yet begun. [citation needed]
In his works Stendhal "plagiarized" reprised appropriated excerpts from Giuseppe Carpani Théophile Frédéric Winckler Sismondi and others.

Known for his acute analysis of his characters' psychology he is considered one of the earliest and foremost practitioners of realism as is evident in the novels Le Rouge et le Noir (The Red and the Black 1830) and La Chartreuse de Parme (The Charterhouse of Parma 1839). [citation needed].