… they lifted their voices together to God and said,
“Sovereign Lord, who made the heaven and the earth and the sea and everything in them, who by the mouth of our father David, your servant, did say by the Holy Spirit, `Why did the Gentiles rage, and the peoples imagine vain things?
The kings of the earth set themselves in array, and the rulers were gathered together, against the Lord and against his Anointed’
— for truly in this city there were gathered together against your holy servant Jesus, who you did anoint, both Herod and Pontius Pilate, with the Gentiles and the peoples of Israel, to do whatever your hand and your plan had predestined to take place.

And now, Lord, look upon their threats,
and grant to your servants to speak your word with all boldness,
while you stretch out your hand to heal,
and signs and wonders are performed through the name of your holy servant Jesus.”

And when they had prayed, the place in which they were gathered together was shaken;
and they were all filled with the Holy Spirit and spoke the word of God with boldness.

(Acts of the Apostles 6:24-31)

The context for this passage is that the Apostles had been arrested by the Jewish authorities for preaching about Jesus. After being released from jail and warned not to preach any more about Jesus, they decide that they need to continue and even increase their preaching, and so they pray for boldness.  This passage shows us two things: 1) that in today’s secular society we look to the example of the Apostles for inspiration on how to act/how to evangelize, 2) we need to pray like the Apostles prayed. What they prayed for (boldness) and how they prayed (the room shook) are both important.