This is an extensive justification for the historicity of Messiah’s resurrection. From the opening paragraph:
The truth of Christianity uniquely stands or falls on Christ’s resurrection. The apostle Paul explains: “If Christ has not been raised, our preaching is useless and so is your faith” (1 Cor. 15:14). “If Christ has not been raised, your faith is futile, you are still in your sins” (1 Cor. 15:17).