When the Lord calls you, you know it. You may not want it. You may not like it. But you'll definitely know it. As this group of prophets and teachers prayed for God's guidance, the Holy Spirit spoke to them in an audible voice. He called Barnabas and Saul to do His work. There was no question whom He was talking about. He made it clear. They didn't know before that instant that He would call them; nevertheless, they had prayed and sought guidance. Little did they know that this would be the first day of the rest of their lives.