Fire is a symbol of the Holy Spirit because fire purifies. Fire purifies metals. It kills germs and impurities. The Holy Spirit purifies our hearts. He purifies our souls. When the Holy Spirit came to the first disciples, they were then able to speak in different languages. God was giving the disciples an ability speak in different languages and bring unity of speech because they were filled with God’s spirit and unified with the desire to bring the Gospel to the world. No one can say Jesus is Lord except by the Holy Spirit.
