Luke 9:22 must suffer . . . be rejected . . . be killed . . . be raised. This is the first of several predictions in Luke of Jesus’ suffering and vindication (v. 44; 12:50; 13:31–33; 17:25; 18:31–33). The disciples struggled to understand what Jesus was saying (v. 45; 18:34). They could not comprehend how Jesus’ predictions fit into God’s plan. Only after Jesus’ resurrection and His explanation of the Scriptures to them did they begin to understand (24:25–27,44–49).