Jesus really worked miracles, and so did the Apostles. The New Testament authors refer to real incidents. [547-550]
Even the oldest sources tell of numerous miracles, event he raising of the dead, as a confirmation of Jesus’ preaching: “But if it is by the Spirit of God that I cast out demon, then the kingdom of God has come upon you” (Mt 12:28). The miracles took place in public; some of the persons involved were known by name, for instance, blind Bartimaeus (Mk 10:46-52) or Peter’s mother-in-law (Mt 8:14-15). There were also miracles that in those Jewish circles were considered shocking and outrageous (for example, the cure of a crippled man on the Sabbath, the cure of lepers). Nevertheless they were not disputed by contemporary Judaism.