What is the evidence of the grace of God that Barnabas saw?
Acts 11:23 (ESV)
23When he came and saw the grace of God, he was glad, and he exhorted them all to remain faithful to the Lord with steadfast purpose,
We are not told what the evidence of the grace of God was that Barnabas saw. From elsewhere in the New Testament, we can assume it refers to faith in Jesus, a willingness to listen to him.
23 When he came and saw the grace of God, he was glad, and he exhorted them all to remain faithful to the Lord with steadfast purpose,