NOTES for Mat 8:1-17
In the Gospel we can find many stories about miraculous healings and the casting out of demons from different people. These miracles are usually called "signs," that is, they serve to show something. For example, in today's stories the miracles are meant to illustrate the fulfillment of Isaiah's prophecy about the coming of the Messiah, who was to "take upon Himself our infirmities and diseases."
For the first readers of the Gospel, who knew these prophecies by heart, the allusion was completely clear: these healings are only the beginning of the work of saving the world, which Christ accomplishes in history through His voluntary suffering (Isa. 53). Thus the context of this prophecy, and Matthew's references to it, leads us beyond the bounds of a particular miracle, which in general has little to do with us personally, and brings us into the history of the world's salvation, where all the events in which the prophecy was fulfilled have their place, and into our own life, when Christ saved our life, healed our sickness, and conquered evil around us or within us.