Ryan Ruby in The Paris Review:
Hans Abendroth was the eldest of three children born to an upper-middle class family in Frankfurt in 1909. Against the wishes of his parents, who hoped he would go into law, he studied classical philology at the University of Freiburg. There he was among the students of Martin Heidegger, a famous cohort that included Hannah Arendt, Herbert Marcuse, Karl Löwith, and Hans Jonas. Written under Heidegger’s supervision, Abendroth’s “Habilitation Thesis,” which analyzed the developing conception of the psyche in the literature and philosophy of classical and Hellenistic Greece, is regarded as a seminal document in the field. In 1935, Abendroth moved to Berlin, where, as a member of a research group at the Prussian Academy of Sciences, he was responsible for translating and preparing a German edition of the Akhmim Codex, a recently discovered Gnostic manuscript dating to the fifth century A.D. Until his early retirement in 1949, he taught courses on Greek philosophy, early Christian theology, and Hellenistic literature at the University of Berlin.
After his retirement, Abendroth began work on The Zero and the One (Null und Eins), the only book he would publish in his lifetime. An unsystematic collection of aphorisms in the style of Nietzsche, Cioran, and the later Wittgenstein, Null und Eins contains reflections on a diverse number of subjects, from the philosophy of mathematics to the ethics of suicide.