Paul Deussen was born on 7 January 1845 in Oberdreis, Neuwied in the Rhine Province, one of eight children of a clergyman of modest means. He became a student, and lifelong devotee, of the German philosopher Schopenhauer, and of the philosophy of Kant; and he became a friend of Friedrich Nietzsche. Deussen was educated at Bonn, Tübingen and Berlin Universities between 1864 and 1881, writing his dissertation on Plato's philosophy. Deussen was appointed Privatdocent and Extraordinarius at the university of Berlin, and Ordinarius, at the University of Kiel. Until 1919, Deussen continued to edit the Schopenhauer Yearbook, as well as working on an edition of Schopenhauer's works. It was when he attended a lecture by Professor Lassen expounding the Shakuntala that Deussen was fired by Sanskrit and Hinduism. His first publication in 1877 was published in English as The Elements of Metaphysics in 1894. It was followed by the translations of The Sutra of the Vedanta in 1906; The Philosophy of the Upanishads also in 1906; and The System of the Vedanta in 1912. His visit to India in 1904 was published in English as My Indian Reminiscences in 1912. However, his autobiographical papers, edited by his daughter Erika and published in German in 1922, have so far not been translated into English. Deussen's System of the Vedanta has been reprinted several times: he uses the Brahmasutra and – rather less — Adi Shankara's commentary on it, as the structure for his exposition. His scholarship has been described as immense, perceptive, and meticulous. Mahinder Gulati refers to him as an Orientalist and Sanskrit scholar. Paul Deussen's name is thus linked with George Boucher, Sir William Jones and Sir John Woodroffe in British India, Anquetil-Duperron and Eugène Burnouf in France, Heinrich Roth, Franz Bopp, Friedrich von Schlegel and Max Müller in Germany, in the European revelation of the wealth of Hinduism as revealed by Sanskrit documents.
Works
Die Elemente der Metaphysik - "nebst einer Vorbetrachtung über das Wesen des Idealismus" - 6. Auflage
Das System des Vedânta. Nach den Brahma-Sûtra's des Bâdarâyana und dem Commentare des Çankara über dieselben als ein Compendium der Dogmatik des Brahmanismus vom Standpunkte des Çankara aus
Die Sûtra's des Vedânta oder die Çariraka-Mimansa des Badarayana nebst einem vollständigen Kommentare des Çankara. Aus dem Sanskrit übersetzt
Allgemeine Geschichte der Philosophie unter besonderer Berücksichtigung der Religionen :
* Band I, Teil 1: Allgemeine Einleitung und Philosophie des Veda bis auf die Upanishad's
* Band I, Teil 2: Die Philosophie der Upanishad's
* Band I, Teil 3: Die nachvedische Philosophie der Inder
Deussen has been called an "outstanding scholar", a "great scholar" who spearheaded study of the Upanishads and Vedic literature, and as a "critical scholar".