Rudolf Otto

Born in Germany in 1869, Rudolf Otto was a Lutheran theologian, philosopher, and scholar of religion whose work had a lasting impact on twentieth-century religious studies. He taught at the University of Göttingen and became widely known for examining religion not only as doctrine or ethics, but as a distinctive kind of human experience.

His most famous book, The Idea of the Holy (originally published in 1917 as Das Heilige), introduced the influential idea of the numinous—the feeling of encountering something mysterious, overwhelming, and fascinating at once. That concept helped shape later discussions of mysticism, worship, and comparative religion.

Otto also traveled widely and wrote about religion across traditions, bringing together theology, philosophy, and close attention to lived experience. Readers still turn to his work for its attempt to describe the emotional force of the sacred in clear, memorable terms.