Mark makes his Jesus perform all the deeds the scriptures say will be performed by the Messiah. He doesn’t spell out that this is what he’s doing. He wants those who hear his gospel being read aloud (as it would have been to the cult’s members) to work it out for themselves: ‘he who has ears let him hear’ and all that.
This isn’t good enough for Matthew, however. He wants to make it obvious what’s going on, so he invents a story to draw attention to it. To do so, he has to have John the Baptist, who has previously acknowledged Jesus as the Messiah and heard God say as much from Heaven, doubt all of it. Matthew considers it worth it to make the more important point that Jesus is truly God’s Chosen One:
John (the Baptist) heard in prison about the works of Christ, and he sent his disciples to ask Him, “Are You the One who was to come, or should we look for someone else?”
Jesus replied, “Go back and report to John what you hear and see: The blind receive sight, the lame walk, the lepers are cleansed, the deaf hear, the dead are raised, and the good news is preached to the poor. Blessed is the one who does not fall away on account of Me.” (Matthew 11:2-6)
Matthew makes Jesus refer to several scattered verses from the scriptures that appear to say that once God’s Kingdom arrives on Earth the deaf shall hear, the blind see and the lame walk. Now you can believe, if you like, that Jesus really did make the blind see and the lame walk because the Kingdom had arrived (though -oops – it hadn’t!) or you can recognise that Matthew (and Mark before him) was aware of these references and made up a hero to embody them. Which is more likely, when every one of the miracles Jesus alludes to in Matthew 11 illustrates specific verses from scripture?
The blind see, the deaf hear, the lame walk (Isaiah 35:4-6) is brought to life in Matthew 9:27-31; 15:31-37 and 9.1-8.
Lepers cleansed: Leviticus 14 materialises as Matthew 8:1-4. The ability to heal a ‘defiling skin disease’ had long been thought to be a sign of the Messiah, so naturally Jesus has to be able to do it.
The dead rise: Daniel 12:2 is resurrected as Matthew 9.18-26.
The good news preached: Isaiah 52:7 becomes Jesus’ message.
A man called Jesus didn’t do these looked-for amazing things. These looked-for amazing things gave rise to a character constructed by myth makers: gospel Jesus.