Christian is the chosen one from the Lord as Paul be chosen

Acts 9:1-22
Saul was still breathing out murderous threats against the Lord's disciples. He took anyone who belonged to the Way, take them as prisoners to Jerusalem.
Saul's confrontation with Jesus, on the road to the old Syrian capital, Damascus, marks a turning-point in the history of the early church.
The story is told three times in Acts: once, here, by Luke, and twice by Saul/Paul himself.
Never has any conversion brought a more radical change. The blinding light leaves Saul sightless for three days, with nothing to do but think.
By the time Ananias reaches him, Saul the persecutor has become 'Brother Saul' - a man who will suffer much for the cause he tried to stamp out.
His immense energy is given at once to preaching Jesus as Son of God and opposition begins.
God said to Ananias, "Go! This man is my chosen instrument to carry my name before the gentiles and their kings and before the people of Israel. I will show him how much he must suffer for my name."
Why?
The Way: The church was known by this name before the people of Antioch invented the new name 'Christian'
Tarsus: A university city with a population of half a million; meeting-place of East and West, Greek and Oriental.
Ananias is an honest disciple of Jesus so God said to him in vision. And Ananias followed the command of the Lord, placing is hands on Saul and praying.
How?
The chosen one from the Lord is the instrument of the Lord, every Christian is the chosen one to proclaim the gospel of Jesus Christ.