Brave to be a witness of the Lord

Acts 5:25~32
Peter and the other apostles replied: "We must obey God rather than men!"
God exalted him to his own right had as Prince and Savior that he might give repentance and forgiveness of sons to Israel. We are witnesses of these things, and so is the Holy Spirit, whom God has given to those who obey him.
The apostles openly held the Council responsible for Jesus' death, and they fear reprisals.
Hang him on a tree: The upright of the cross was a fixture, and might well be a saw-off tree trunk.
Why?
Obey God rather than men, because God has authority rather than men has, God is good to those who obey him.
Face to such threaten, apostles may have courage to speak and do the witness, because he have the Holy Spirit with them, and they do not fear the dead.
How?
Am I a witness of the Lord, Yes, I like to be and hope could do it well under the blessing of Holy Spirit.