Acts 28:23, 31

When they had set a day for Paul, they came to his lodging in large numbers. And he carefully explained [Christianity] to them from morning until evening, solemnly testifying about the kingdom of God and trying to persuade them concerning Jesus, both from the Law of Moses and from the [writings of the] Prophets.

preaching and proclaiming the kingdom of God and teaching about the Lord Jesus Christ with all openness and boldness, unhindered and unrestrained.