with the soldier who was guarding him.
Three days later he called together the leaders of the Jews.
When they had gathered he said to them, "My brothers,
... it is on account of the hope of Israel that I wear these chains."
He remained for two full years in his lodgings.
He received all who came to him, and with complete assurance
and without hindrance he proclaimed the Kingdom of God
and taught about the Lord Jesus Christ.
-- Acts 28:16-20, 30-31
The title "Christ" means "Anointed One" (Messiah). Jesus is the Christ, for "God anointed Jesus of Nazareth with the Holy Spirit and with power" (Acts 10:38). He was the one "who is to come" (Lk 7:19), the object of "the hope of Israel" (Acts 28:20).
-- CCC 453