Worshiping the Lord and fasting

Acts 13:1-13:3
While there were prophets and teachers, they were worshiping the Lord and fasting, the Holy Spirit said, "Set apart for me Barnabas and Saul for the work to which I have called them."
So after they had fasted and prayed, they placed their hands on them and sent them off.
From this point on in Acts, Saul/Paul is the center figure.
The church at Antioch, directed by the Holy Spirit, selects its best men for pioneer work.
Why?
Herod who persecuted church and dead by a worm. Meanwhile, the ministry of God's word grew by leaps and bounds. Here is the turn of the kingdom of God, the authority of political seems stronger, but failed.
Although obey to the God is not be focused by the world, but we can see the authority of God changing this world.
Worshiping the Lord and fasting symbolizing give honor to the Lord with whole heart and mind.
How?
Worshiping the Lord and fasting is the key that Holy Spirit will come.