In prose as in verse he is a pessimist more by nature than as a result of reasoning. It is his sensibility rather than his intellect that speaks. He constructed no system; he gathers his impressions, his observations, and attempts, not without arbitrariness, to generalize them. His philosophy is entirely physiological: the world is bad because his personal life is bad. He conceives the world in most terrifying fashion, and supposes that if all men do not judge it as he does, it is because they are mad. Optimism, in fact, is fairly widespread. While there is life there is hope. The fable of Death and the Wood-cutter is a fair symbol of humanity's out-look. On the other hand it is certain that literatures and philosophies, even those which aim to produce laughter as well as those which exalt life, are generally pessimistic. There is a tragic background to Molière's plays and a gloomy background to Nietzsche's aphorisms. Absolute, beatific optimism is compatible only with a sort of animal insensibility and stupidity: only idiots are constantly laughing and are constantly happy to be alive. Absolute pessimism, however, can develop only in certain depressed organisms: its extreme manifestations are plainly pathological and connected with maladies of the brain. Schopenhauer affirms that life is evil, yet he loves it and enjoys it. Let fame come, and he expands with cheer. His character is by no means gloomy. He is at the same time a philosopher and a humorous writer. Leopardi never knew these expansions. He affects to despise even glory, for which he nevertheless labors. But he, too, is a keen, witty spirit, although ever bitter; and he, too, is a humorist. He certainly takes pleasure in writing. If he does not know life's other joys, he knows that of being able to impart a beautiful, puissant form to a lucid thought. Nevertheless his existence, much more logical than Schopenhauer's, is in exact accord with his philosophy. Sickly, isolated, not understood, Leopardi lacked the strength to react; but if he allowed himself to be swept along by his sadness, it was at least in full knowledge of the fact. He questions his despair and enters into discussion with it. And this questioning presented us with those fine dialogues which, together with a few thoughts, were gathered together under the title _Operette Morali_.