The two questions with which Isaiah 53 begins determine the direction of the section (cf. Isaiah 53:1).  What follows is a description of our Lord that shows why it was impossible to believe without a supernatural act of God.  There was nothing about the contents of the Gospel according to Isaiah that were believable (cf. Isaiah 53:2-12).  Sprinkled throughout the section are the results of believing the Gospel (cf. Isaiah 53:5, 10-11).  The section affords an opportunity for us to urge saving faith and also an opportunity to test the genuineness of that faith.  Believers do experience peace and healing (Isaiah 53:5); believers also become “his offspring” (Isaiah 53:10) which means they do look like Him.  In these verses, then, we’re making sure that everyone in the house responds unlike the majority in Isaiah’s day who didn’t believe the message and didn’t perceive God’s saving power.