Believe in the Lord Jesus, and you will be saved

Acts 16:22-34
Under mistreated and was put into prison, be fastened feet in the stocks. Paul and Silas were praying and singing hymns to God.
Suddenly there was such a violent earthquake that the foundations of the prison were shaken. At once all the prison doors flew open, and everybody's chains came loose.
Paul shouted, "Don't harm yourself! We are all here!"
The jailer called for lights, rushed in and fell trembling before Paul and Silas. He asked, 'Sir, what must I do to be saved?" They replied, "Believe in the Lord Jesus, and you will be saved - you and your household."
Trouble quickly follows, Philippi was a Roman colony and the owners clamor(叫囂) for their rights as Roman citizens. Paul the Jew ha the same rights, but no one knows that.
The arrest of Paul and Silas is followed by the dramatic conversion of their jailer, after an earthquake opens the prison doors and parts the prisoners' chains.
Why?
How great the Lord is! He saved his servants Paul and Silas from the prisoner.
How great the faith of Paul and Silas, under such situation they were praying and singing hymn to God!
Believe in the Lord Jesus, you will be saved! It is very easy in our heart if you accepted.
The jailer asked Paul and Silas is how they could not be killed for the doors of jailer were opened, but Paul and Silas gave them the fundamental answer. Don't be the servant of Roman empire instead of being the servant of the Lord.
How?
Who is your Lord! Jesus Christ is my Lord!