In some cultures, the title below your name on your business card is very important. It identifies your status. The way you are treated depends upon your title as compared with others around you.
If Paul had a business card, it would have identified him as an "apostle"meaning "sent one." He used his title not out of pride but out of wonder. He did not earn that position; it was "by the commandment of God our Savior and the Lord Jesus Christ." In other words, his was not a human but a divine appointment.
Paul had formerly been a "blasphemer, a persecutor, and an insolent man. He said that he considered himself to be the "chief" of sinners. But because of God's mercy, he was now an apostle, one to whom He had sent out to share that gospel. Let us go forth, as called of God, redeemed by Jesus' precious blood; His love to show; His life to live, His message speak, His mercy give.
What is more amazing is that like the apostle Paul we are all out by the King of kings to the world (Acts 1:8). Let us all recognize with humility that we did not deserve such a commission either. It is our privilege to represent Him and His eternal truth in word and in deed each day to all around us.