Base on the word of the Lord to make decision

Acts 22:30-23:5
Before the Sanhedrin the high priest Anaias ordered those standing near Paul to strike him on the mouth. Then Paul said to him, "God will strike you, you whitewashed wall! You sit there to judge me according to the law, yet you yourself violate the law by commanding that I be struck!"
It is written "Do not speak evil about the ruler of your people." Paul said he did not know he is the high priest.
Jesus stood silent before his accusers, but Paul is vocal. He does not hesitate to play one party against another in the Council, by stating that he is on trial for his belief in the resurrection of the dead.
Why?
Paul criticized that the high priest accused he brought Gentile enter the temple, but now the Gentile commander asked them to judge according to the law, but the high priest did not follow the law but order others strike Paul. It is against the law.
The commander order them have a meeting. He wanted to find out exactly why Paul was being accused by the Jews. This is the command from the ruler of the people.
The Christian should obey the law and follow the word of the Lord.
How?
Base on the word of the Lord to do everything, let the Holy Spirit help us to have clean conscious and pure heart.