Twilight of the Idols

The central move of the book is genealogical. Nietzsche does not ask whether a value is true; he asks where it came from and what it was for. Take the long philosophical habit of treating the changing, physical world as an illusion and some unchanging "real" world as the truth behind it. In a compact section he calls "'Reason' in Philosophy," he argues that philosophers made an idol of permanence out of sheer discomfort with becoming. They could not bear that things pass, so they invented a realm where nothing does, and then called the passing world a lie.

Their instrument for this, he says, is language itself. Because our grammar puts a subject behind every verb — the lightning that flashes, as if the flash were separate from the lightning — we come to believe there must be a doer behind every deed, a soul behind every act, a God behind the world. "I am afraid we are not getting rid of God," he writes, "because we still believe in grammar." The idol, on this reading, is baked into the way we speak before we ever start to think.

The book's most systematic stretch is a section he numbers as "The Four Great Errors," and it is where the hammer does its most careful work. The errors are the mental reflexes he thinks let the idols keep standing, and he treats them almost as habits of a nervous mind rather than as arguments to be refuted.

The first is confusing cause and effect. We notice that healthy, long-lived people tend to eat and live in a certain way, and conclude that living that way produces the health — when, Nietzsche suggests, the vitality came first and the disciplined life was its expression, not its cause. The second is the invention of false causes: when something happens to us, especially something frightening, we reach for a familiar explanation that soothes us — a spirit, a sin, a divine will — because any explanation feels better than none. We prefer a known cause, even a wrong one, to the open dread of not knowing.

Behind all the idols, Nietzsche places one figure, and he puts him almost at the front of the book, in a section titled "The Problem of Socrates." Socrates is where the trouble starts — the moment the West decides that thinking clearly matters more than living well, that the unexamined life is not worth living, that reason should sit in judgment over instinct. To most of the tradition, that turn is the birth of philosophy itself. To Nietzsche it is the first great symptom, the point where a confident culture began to distrust itself and reach for reasons the way a sick man reaches for a cure.

He reads Socrates less through his arguments than through his person. Here was an ugly, low-born Athenian who, by his own account, seethed with dangerous appetites — and who answered them not by mastering them in the old aristocratic way but by turning reason into a tyrant over them. Dialectic, the relentless demand to give grounds for everything, Nietzsche treats as a weapon of the resentful: a way for the clever outsider to trip up the noble and confident, who had never needed to justify their instincts and could not do it on command. Making everyone reason was a way of dragging everyone down to the terrain where the sick had the advantage.

Twilight of the Idols was one of the last things Nietzsche finished. Within months of sending it off, in Turin in January 1889, he collapsed into the mental illness from which he never recovered, and he spent his remaining eleven years unable to write, cared for first by his mother and then his sister. The book he had called a short summary of his whole philosophy became, by accident, something close to a testament — the compact statement of a mind at the height of its powers just before they went out.