“From that time Jesus began to show to his disciples.” Once the disciples realized that Jesus was the Christ, the Son of God, Jesus began to tell them that he must suffer, die, and be raised from the dead. Jesus taught about his suffering, death, and resurrection many times. He taught about it right after the disciples recognized him as the Christ (Matt. 16:21; Mark 8:31, 32; Luke 9:22). Then he taught about it again immediately after the Transfiguration (Matt. 17:9-12; Mark 9:9-13); then again when he was in Galilee shortly after the Transfiguration (Matt. 17:22, 23; Mark 9:31, 32; Luke 9:43-45), then again at the Feast of Tabernacles (John 8:21, 28); then again while he was going up to Jerusalem for the Passover, at which time he would be killed (Matt. 20:17-19; Mark 10:32-34; Luke 18:31-34); and then again when he was in Jerusalem for the Passover (Matt. 26:2; cp. John 12:7). In spite of his clear teaching about it, however, they did not understand what he meant.
[For more on Jesus’ teaching about his suffering and death, see commentary on Luke 18:34.]
“be raised from the dead.” The words “from the dead” are added for clarity. Jesus would be killed and rise after three days, “rise,” which would have to mean rise from the dead. This teaching of Jesus was very important, and is repeated in Matthew 16:21, Mark 8:31, and Luke 9:22.