Jesus called 12 disciples

Luke 6:1-19
The Son of Man is lord of the Sabbath. Jesus called himself son of man.
Jesus disciples plucked and ate some heads of grain on a Sabbath.
Jesus withered hand to heal a man.
Jesus does the good instead harm. Jesus follows the law with love and does good things. Laws of God let us do the right thing instead of forbidden to do some good things.
Jesus called his disciples and chose from them twelve.
All the crowd sought to touch him, for power came out from him and healed them all.
Why?
Jesus didn't like John, but eating and drinking with sinners, so Pharisees criticized him. The problem they did not know that Jesus is the Lord.
Luke emphasized that Jesus is the Lord from those stories.
Twelve is the number of God, based on these 12 disciples to preach gospel. So am I shall teach at least 12 people, let them do have faith and vision to preach gospel.
When God calls me, can I hear and response it? I will when I know that the calling of the Lord. Serving God with the power of God, there will be not difficulty to preach gospel.
How?
Humble myself, carefully to listen the calling of the Lord.