Taine once wrote: "When we know how an artist invents we can foresee his inventions." As to Zola, there is little need now for critical judgments on his work. He is definitely "placed"; we know him for what he is--a romancer of a violent idealistic type masquerading as an implacable realist; a lyric pessimist at the beginning of his literary career, a sonorous optimist at the close, with vague socialistic views as to the perfectibility of the human race. But he traversed distances before he finally found himself a field in which stirred and struggled all human animality. And he was more Zola when he wrote Therese Raquin than in his later trilogies and evangels. As an artist it is doubtful if he grew after 1880; repetition was his method of methods, or, as he once remarked to Edmond de Goncourt: "Firstly, I fix my nail, and then with a blow of the hammer I send it a centimetre deep into the brain of the public; then I knock it in as far again--and the hammer of which I make use is journalism." And a tremendous journalist to the end was Zola, despite his books and naturalistic theories. Again, and from the diary of the same sublimated old gossip, Goncourt, Zola speaks: "After the rarefied analysis of a certain kind of sentiment, such as the work done by Flaubert in Madame Bovary; after the analysis of things, plastic and artistic, such as you have given us in your dainty, gemlike writing, there is no longer any room for the younger generation of writers; there is nothing left for them to do, ... there no longer remains a single type to portray. The only way of appealing to the public is by strong writing, powerful creations, and by the number of volumes given to the world." Theory-ridden Zola's polemical writings, like those of Richard Wagner's, must be set down to special pleading.