People have got to know that you're a christian. They have to know that you pray, and that you are a servant of God, chosen by him. But how can I, by myself, change other people's hearts? Through Obedience, Following Christ and change. This is how you get the fire that attracts others. The fire he talks about is the Holy Spirit. The Spirit that tramples on Satan and uses him and your enemies as a stair for your elevation. This is real fire.