Borges was not a philosopher, and never considered himself to be one. His father was particularly interested in metaphysics and introduced the young Borges to the basic tenets of idealism, as well as to Zeno the Eleatic’s paradoxes (see p. 13 below). As a youth in Switzerland Borges learned German and, after finding Kant intractable, read for the first time the philosopher whom he would come to regard above all others, Schopenhauer. He subsequently read, or read about, many major thinkers, claiming in later life that there was a good deal in their writings that he did not understand and describing himself, in “A New Refutation of Time,” as “an Argentine adrift on a sea of metaphysics” (SNF 317). Largely self-taught, he acquired a broad knowledge of philosophy from general guides, such as Lewes’s Biographical History of Philosophy, Mauthner’s Wörterbuch der Philosophie (Dictionary of Philosophy), and Russell’s History of Western Philosophy, from reading works of the philosophers themselves, and from discussions with his father’s friend Macedonio Fernández. Nevertheless, he returned time and again to the same thinkers – Heraclitus, Zeno, Plato, Spinoza, Berkeley, Hume, Schopenhauer, and Nietzsche – and to the same, predominantly metaphysical, problems: substance (matter or reality), time, identity, the limits of human understanding, language, infinity, eternity, death, causality, determinism and chance, and the question of design in the universe, as well as to mathematical and theological questions (he was particularly interested in Buddhism and in Swedenborg’s mysticism). He published a number of essays on philosophical issues, the longest and best known being “A New Refutation of Time,” and he planned a book on Spinoza which he never wrote.