This book reconstructs the cornerstones of Jesus's moral teachings about how to lead a good, even exemplary, human life. It does so in a way that is compatible with the most prominent, competing versions of the historical Jesus. The work also contrast Jesus' understanding of the best way to lead our lives with that of Friedrich Nietzsche. Both Jesus and Nietzsche were self-consciously moral revolutionaries. Jesus refashioned the imperatives of Jewish law to conform to what he was firmly convinced was the divine will. Nietzsche aspired to transvalue the dominant values of his time in service of a higher vision. The interplay of these radical versions of the good human life, seasoned with critical commentary from the sciences and humanities, opens lines of inquiry that can help us answer that enduring, paramoun t question, "How should we live our lives?".