The saints who wrote the four holy gospels had an enormous task, namely to present to us the Person of Jesus Christ, the God-man.
The evangelists’ primary literary means for doing this was to recount the ways in which Christ fulfilled all the prophecies that had foretold His coming.
The prophecies express the beautiful vision of salvation. And yet, the picture does not come fully clear in the Old Testament books. Only when they were fulfilled in Christ did the meaning of the prophecies fully emerge.
The evangelists grasped this, and wrote their books in order to complete the Bible, to make the Old Testament make sense by writing the New.
The vision of the prophets included the healing of the blind and deaf, and many other miraculous works which transcend the fallen state of created nature.
Above all, the prophets foresaw the New Covenant as a whole: the state of reconciliation and friendship between sinners and the Creator, Who had previously been justly offended by sin.
This is why the four evangelists narrate the miracles worked by Christ as a series of preludes, leading up to the miracle of His death and resurrection. Faith in the New Covenant made in Christ’s blood is the ultimate miracle. It is the miracle of the restoration of the original friendship between God and man. This friendship, which we have by faith in Christ, is itself the foundation of all the many other gifts of the Creator, like sight and hearing, knowledge and wisdom.