Jesus is the light of the world. Christians cannot keep the Light to themselves. They are commanded to let their Light shine to everyone. It is the responsibility of every Christian to share the Good News with those God brings us into contact with. We practice sharing about Christ and inviting friends to church and sharing with them the gospel of Christ through personal bible study and prayer.
To follow Jesus' Great Commision
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