What made Saul the man with all the answers in Barnabas's search?
Saul had received three years of revelations that no one else had received. Because of that unique revelation, Barnabas sought him out in Tarsus, recognizing that Saul possessed the message for Gentiles. That is why he is called the man who had all the answers.
Les explains that when Barnabas saw the sudden influx of Gentiles into the assembly at Antioch, the Holy Spirit moved him to go looking for Saul. Saul had the message for Gentiles, so Barnabas traveled up into the river valley to Tarsus, in Cilicia, to seek or look for him. The reason was that Saul had now had three years of revelations that no one else had had; he was the man who had all the answers. When he found him, he brought him to Antioch, and the two men met.