The book traces from the thirteenth century the gradual awakening of the West to the spiritual qualities of other religions and the various efforts made to place them in relation to Christianity. It explores the reports sent home by Jesuit missionaries in China, the advance in knowledge in nineteenth-century Europe, and the gradual decline in Western "provincialism". In doing so, the book puts forwards suggestions for the relation between Christianity and other religions and calls for open conversations between representatives of different faiths with the aim of increased unity of spirit.