On arriving there, they gathered the church together and reported all that God had done through them and how he had opened the door of faith to the Gentiles.
And they stayed there a long time with the disciples."
Committed to the Grace of God
I love that phrase. Perhaps after one is baptized and begins a new life following God, it would be a perfect blessing. Paul & Barnabas were COMMITTED to the grace of God before they began their work, and now they had completed that phase of their mission.
Are we ever finished with our work for the Lord? NEVER !!!
P & B had a specific mission they were led to do and they had completed that portion, by the grace of God, without being killed!!! When they got back to Antioch, they were anxious to report back to the Christian assembly, a mission report is still very important when one returns home.
When Paul's first missionary journey was completed, he and Barnabas had covered about 1300 miles. 500 were over water in the unreliable sailing vessels of that day, and 800 were over some of the roughest and most treacherous terrain on earth. (15:26)
"And they spent a long time with the disciples" time spent recharging their spiritual batteries.