When Jesus began His ministry he opened up this chapter and verses of Isaiah 61:1-2 to proclaim Himself as The anointed of The Lord and closed the scroll. Chapter 63 is what Jesus is going to say at His second coming in His anger and calling Israel to remember the days of old, return to Me.
Paul, before the people of Jerusalem, presents his testimony of persecuting the people of the Way and the transformation that came upon meeting Jesus on the road to Damascus. He is using the law against the pagan world to stop his scourging and begin his journey to Rome.