Rudolf Otto (25 September 1869 – 7 March 1937) was a German Lutheran theologian, philosopher, and comparative religionist. He is regarded as one of the most influential scholars of religion in the early twentieth century and is best known for his concept of the numinous, a profound emotional experience he argued was at the heart of the world's religions. While his work started in the domain of liberal Christian theology, its main thrust was always apologetical, seeking to defend religion against naturalist critiques, making him a more conservative figure. Otto eventually came to conceive of his work as part of a science of religion, which was divided into the philosophy of religion, the history of religion, and the psychology of religion. He attended the Gymnasium Andreanum in Hildesheim and studied at the universities of Erlangen and Göttingen, where he wrote his dissertation on Martin Luther's understanding of the Holy Spirit (Die Anschauung von heiligen Geiste bei Luther: Eine historisch-dogmatische Untersuchung), and his habilitation on Kant (Naturalistische und religiöse Weltansicht). By 1906, he held a position as extraordinary professor, and in 1910 he received an honorary doctorate from the University of Giessen.
Otto's fascination with non-Christian religions was awakened during an extended trip from 1911 to 1912 through North Africa, Palestine, British India, China, Japan, and the United States. He cited a 1911 visit to a Moroccan synagogue as a key inspiration for the theme of the Holy he would later develop.
The Idea of the Holy
Otto's most famous work, The Idea of the Holy was one of the most successful German theological books of the 20th century, has never gone out of print, and is available in about 20 languages. The central argument of the book concerns the term numinous, which Otto coined. He explains the numinous as a "non-rational, non-sensory experience or feeling whose primary and immediate object is outside the self". This mental state "presents itself as ganz Andere, wholly other, a condition absolutely sui generis and incomparable whereby the human being finds himself utterly abashed." According to Mark Wynn in the Stanford Encyclopedia of Philosophy, The Idea of the Holy falls within a paradigm in the philosophy of emotion in which emotions are seen as including an element of perception with intrinsic epistemic value that is neither mediated by thoughts nor simply a response to physiological factors. Otto therefore understands religious experience as having mind-independent phenomenological content rather than being an internal response to belief in a divine reality. Otto applied this model specifically to religious experiences, which he felt were qualitatively different from other emotions. Otto felt people should first do serious rational study of God, before turning to the non-rational element of God as he did in this book.
Later works
In Mysticism East and West, published in German in 1926 and English in 1932, Otto compares and contrasts the views of the medieval German Christian mystic Meister Eckhart with those of the influential Hindu philosopher Adi Shankara, the key figure of the Advaita Vedanta school. thus falling within the tradition of apophatic theology. Otto was also one of the very few modern theologians to whom C. S. Lewis indicates a debt, particularly to the idea of the numinous in The Problem of Pain. In that book Lewis offers his own description of the numinous:
German-American theologian Paul Tillich acknowledged Otto's influence on him,
Non-Christian theology and spirituality
Otto's ideas have also exerted an influence on non-Christian theology and spirituality. They have been discussed by Orthodox Jewish theologians including Joseph Soloveitchik and Eliezer Berkovits. The Iranian-American Sufi religious studies scholar and public intellectual Reza Aslan understands religion as "an institutionalized system of symbols and metaphors [...] with which a community of faith can share with each other their numinous encounter with the Divine Presence." Further afield, Otto's work received words of appreciation from Indian independence leader Mohandas Gandhi.
Religious studies
In The Idea of the Holy and other works, Otto set out a paradigm for the study of religion that focused on the need to realize the religious as a non-reducible, original category in its own right. The eminent Romanian-American historian of religion and philosopher Mircea Eliade used the concepts from The Idea of the Holy as the starting point for his own 1954 book, The Sacred and the Profane. The paradigm represented by Otto and Eliade was then heavily criticized for viewing religion as a sui generis category, The American Episcopal priest John A. Sanford applied the ideas of both Otto and Jung in his writings on religious psychotherapy.
Philosophy
The philosopher and sociologist Max Horkheimer, a member of the Frankfurt School, has taken the concept of "wholly other" in his 1970 book Die Sehnsucht nach dem ganz Anderen ("longing for the entirely Other"). Walter Terence Stace wrote in his book Time and Eternity that "After Kant, I owe more to Rudolph Otto's The Idea of the Holy than to any other book." Other philosophers influenced by Otto included Martin Heidegger, Leo Strauss,