The first time Jesus predicts His death is found in Matthew 16:21, in which He also adds His future resurrection. Interestingly, Peter expressed his objections against it and Jesus quickly and sharply rebuked him for it (Matthew 16:21-23; cf. Mark 8:31-32, Luke 9:21-22). Being the true Savior He was, Jesus would not let anything get in the way of His mission to sacrifice Himself for others (Hebrews 12:2; Matthew 26:36-46; Mark 14:32-42; Luke 22:39-46). The second instance was post-Transfiguration and after He had also healed a boy who had been demon-possessed (Mark 9:30-32; cf. Matthew 17:22-23; Luke 9:43-45). Unsurprisingly, Jesus’ predictions were met with much distress by His disciples (Matthew 17:23) who did not understand what He was saying. Finally, Jesus predicted His death and resurrection during He and His disciples’ journey to Jerusalem (Matthew 20:17-19; cf. Mark 10:32-34; Luke 18:31-34). Aside from these instances, the book of John records Jesus subtly implying his death (John 12:7-8; 13:33; 14:25). He treats it metaphorically in other gospels (John 2:18-22; Matthew 12: 40; cf. Matthew 16:4; Luke 11:29-32).
Jesus came to the earth "to seek and to save the lost" (Luke 19:10). He secured salvation for those who put their trust in Him through His death and resurrection (1 Corinthians 15:3-7; John 3:16-18, 36; Ephesians 2:1-10). While His life was filled with wonderful miracles and teachings, they would have been nothing without the work of His death on the cross for the atonement of our sins and His resurrection that proved it. Jesus’ death was the sufficient sacrifice for our sins. Without His death and resurrection, He would just be another good teacher. Jesus prepared His followers for His death by communicating to them multiple times that He would die and rise again. When He died the chief priests and Pharisees, remembering that He said He would rise again, asked Pontius Pilate to put a watch over the tomb where His body was kept (Matthew 27:62-64). In predicting His death to His followers, Jesus ensured they understood His deity and His purpose for coming to Earth, especially since the Jews expected the Messiah to come as a conqueror who would free them from Roman rule. Jesus said that He came to fulfill the Law and the Prophets (Matthew 5:17), and one of the main ways He did this was through His death: His perfect sacrifice is what the sacrificial system foreshadowed (Hebrews 9—10). Jesus was the perfect, once for all, sacrifice; His worth is so great that His death covered the price for all of our sins (Romans 5:12-21).