Hannah Arendt became Martin Heidegger's student at the University of Marburg in 1924. She was eighteen years old. He was thirty-five and already famous in university circles. (Three years later, when Being and Time was published, he would be hailed as a major philosopher). She was beautiful and, needless to say, the smartest girl in the class. He was attracted, and he moved. Within months they were lovers. The affair lasted four years.

Heidegger did all the controlling, Hannah did all the worshiping -- naturally, how could it have been otherwise -- but the dynamic between them was something of an equalizer. He needed her intelligent adoration as much as she needed to give it. They both approached his talent for thinking with reverence, each believing he was a vessel of containment for something large, something to be served, protected, and responded to always. This intensity between them, as it turned out, proved a bond stronger than either love or world history.