Ideas about the Kingdom of the Heavens around us and the unity of believers in Christ within it
In his second trial before the Sanhedrin, Peter declared that Jesus had come to give repentance and remission of sins to Israel and to give the Holy Spirit to those who obeyed. Repentance, forgiveness and obedience to the Spirit are tied together.
When Jesus unfavorably compared the unrepentance of the Galilean towns where he had preached to the repentance Tyre, Sidon and Sodom would have shown to the same preaching. the repentance of which he spoke clearly included behavioral change.
The purpose of church discipline is restoration, a process that is to be initiated by a person injured or offended by a wrong behavior. The disciplinary process has no valid application to erroneous beliefs, as such. The New Testament never suggests that worldly penalties should be attached to the process.