Have you pictured in your mind the storm that Paul and Luke, and some others endured on the way to Rome?
“When the south wind blew softly, supposing that they had obtained their desire, putting out to sea, they sailed close by Crete. But not long after, a tempestuous head wind arose, called Euroclydon. So when the ship was caught, and could not head into the wind, we let her drive. And running under the shelter of an island called Clauda, we secured the skiff with difficulty. When they had taken it on board, they used cables to undergird the ship; and fearing lest they should run aground on the Syrtis Sands, they struck sail and so were driven. And because we were exceedingly tempest-tossed, the next day they lightened the ship” (Acts 27:13-18).
If you continue reading the biblical text, you will see more that Luke shows of the storm, yet, through it all, Paul kept a cool head.
The way to keep calm in the storms of life is to live by faith in God, which does not mean that He removes the storms, but that He guides you through them, and knowing that your life is in His hands, brings peace to the soul.