The literature on anthropological studies of Christian conversion movements has hinged on two divided camps: first, emphasis on the continuity with traditional cosmology in the face of Christian appearance, and second, strong emphasis on the rupture from the past and the new life. This paper intends to examine the multiple narratives from the first generation Paiwan converts and second generation converts to consider how converts' conceptions of "tradition" and Christianity gradually shift over time. The mass conversion to Christianity among the indigenous peoples of Taiwan after War World II, "The Twentieth Century Miracle," as it was called by Canadian Presbyterian missionaries to Taiwan then, was characterized as "people's movement without missionaries." Indigenous evangelists were trained to send messages to remote parts of the island and the translation of Bible was the urging yet time-consuming task that could not catch up with the speed of conversion. Within twenty years, 80 percent of indigenous population claimed to be Christians, either Presbyterian or Catholics. This paper will rethink how the concept of conversion can enhance or hinder our understanding of the long term processes.