The Holy Spirit had descended upon him when he was baptized (3:23). He was led by the Holy Spirit into the wilderness where he was tested by the devil. Having overcome each of the temptations set before him, Jesus, filled with the power of the Spirit returned to Galilee (4:1-14).
When he was in his hometown, he went to the synagogue as he was accustomed to do. There, he read passages from the scroll.
Jesus said, "The Spirit of the Lord is upon me, because he has anointed me to bring good news to the poor," an echo of Isaiah 61:1.
Luke tells us that Jesus said that the Lord had sent him to proclaim release to the captives and to let the oppressed go free. This call echoes Isaiah's reminder that the Lord is not that impressed with acts of piety but prefers that the nation would loose the bonds of injustice, undo the thongs of the yoke, let the oppressed go free...(58:6).
He returned the scroll to the attendant and sat down. Everybody stared at him.
The people in the synagogue that day had heard the prophecies of Isaiah many times. They would also have been aware of the times that they had failed to care for the poor and the oppressed. And, there in Nazareth, at the time they were living, they themselves would have thought of themselves as oppressed, captive to the powerful Rome.
And he said to them, "Today this scripture has been fulfilled in your hearing."
Think about the terms "today" and "fulfilled."