What do we do to build the Kingdom of God?
At one point during Jesus' ministry, he asked his disciples who the crowds said that he was. Then he asked them directly," who do you you say that I am?"
Simon Peter answered, "You are the Messiah, the Son of the living God."
Jesus replied, "Blessed are you, Simon son of Jonah, for this was not revealed to you by flesh and blood, but by my Father in heaven. And I tell you that you are Peter,and on this rock I will build my church, and the gates of Hades will not overcome it. Matthew 16:16-18 (NIV)
One heart recognized Jesus for who he is, and the church was born.
The foundation of the Kingdom of God rests on our recognizing and accepting Jesus Christ, not just as Savior, but also as Lord. We become disciples of Jesus and we are then sent out to make disciples out of everyone else.
Our mission here on earth was clearly laid out by Jesus in our great commission.
"Then Jesus came to them and said, "All authority in heaven and on earth has been given to me. Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age." Matthew 28:18-20
Everything else that we do must take second place to this.
That is how we build the Kingdom of God - one heart at a time.