Jesus had always displayed His supernatural power, as He walked this earth for three years, the Son of God in human form. He had healed the sick, raised the dead, fed the hungry, and delivered the demon-possessed.
After His resurrection, John tells us, Jesus did many more miracles that were not included in John’s account. We’ve already seen that He appeared and disappeared to His disciples as He chose, unhindered by locked doors; and when He appeared, He brought them His Peace and overflowing joy, while preparing them for the mission He was sending them forth to fulfill.But, even though he did not record nearly all of Jesus’ miracles, performed after His resurrection, John had a definite purpose in including all that he did. “These are written,” he says, “so that you may continue to believe that Jesus is the Messiah, the Son of God; and that by believing in Him, you will have life by the power of His Name.” John 20:31 NLT
This is the purpose of John’s writing, and it is the purpose of all true preaching and writing about Jesus Christ since that time. Those who truly believe in Jesus, the Son of God, receive Life from Him through the power of His Name. He is raised from the dead, never to die again; and having defeated death once and for all, He is sharing the power of His resurrection with those who believe in Him. His Mission is accomplished, and His followers now spread the word far and wide, so that many will believe, and that those who already believe may continue to grow in their faith.