A paper by Lawrence Whitney about Paul Tillich’s “Protestant Principle” as it registers in Confucianism was published in the Bulletin of the North American Paul Tillich Society with responses by Bin Song and Heup Young Kim, and then Whitney’s response to the respondents. See here: https://www.academia.edu/45160997/Confucianism_and_Tillich_s_Protestant_Principle?source=swp_share