When he came and saw the grace of God, he was glad, 

he exhorted them all to remain faithful to the Lord with steadfast purpose,

for he was a good man, full of the Holy Spirit and of faith. 

…And a great many people were added to the Lord.’ 

Acts 11.23-24

Even before this, in verse 22, the report came to the ears of the church.  It was on hearing a report of good news, that they sought to see.  At this point they could have gone with critical eyes and a faithless heart, but it was not so with Barnabas.  

Barnabas saw with good eyes, lived from a heart of faith, and his mouth was a fountain of fresh water. 

There is a connection here of 1. beholding, 2. believing, and 3. blessing / proclaiming. If our eyes are good then the whole being is filled with light, and out of the abundance of the center-most heart the mouth speaks. But it is the Holy Spirit working in us to weave this organic system into a whole: the eyes-mouth relationship via the heart; the words of life and truth bearing the fruits of faith and gladness in other lives because of its perfect operation.