The fundamental difference between Judaism and Christianity lies in their views on human effort and the need for a savior. Christianity emphasizes the need for a savior to save individuals from their personal transgressions, iniquities, and sins, whereas Judaism believes that individuals can achieve salvation through their own efforts and good deeds. The book of Isaiah, particularly chapter 53, provides a clear explanation of the atonement and the substitutionary death of Jesus Christ, which is the central message of the Christian gospel.
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