The Isaiah passage he read outlines the work he was anointed to do:
to preach the gospel to the poor
to heal the broken-hearted
to preach deliverance to the captives and recovering of sight to the blind
(that these are linked makes me think of the freedom that comes when one is finally and truly able to "see" truth)
to set at liberty those who are bruised
(makes me think of the captivity and damage that comes from emotional trauma as well as physical trauma and sin)
to preach the acceptable year of the Lord.
Below is what Martin Luther King thought that last phrase meant, taken from a sermon he preached in 1966. A good reminder of some personal guidelines as I start a new year.