Sentence:  Because <WSD>Christianity</WSD> teaches not only salvation in history , but salvation by the history of Christ , such an interpretation of death would require a drastic revision of the Christian understanding of the work of Christ . 
Meaning of the word marked with <WSD> tags:  a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior