In the Gospel, Jesus does some flashy things. He teaches and preaches, just yesterday he cast out a demon, and today he heals Simon Peter's mother-in-law and everyone in the town of Capernaum. 
But what is the most important thing? Because it's not any of these. 
It's something more basic, more fundamental. Listen in to Deacon Ben's homily and find out exactly what the most important thing is.
For the daily readings, see the USCCB.