The Fifth Dimension. John Hick. Oxford: Oneworld Publications, 1999. Page 79.

But the most explicit teaching of pluralism as religious truth comes from the region between east and west, namely Iran (Persia). It was here that the nineteenth-century prophet Baha'u'llah taught that the ultimate divine reality is in itself beyond the grasp of the human mind, but has nevertheless been imaged and responded to in different historically and culturally conditioned ways by the founders of the different faith-traditions. The Baha'i religion which he founded continues to teach this message in many countries today.