The tongues of cleansing fire which settled upon the disciples gathered in the Upper Room on the day of Pentecost correspond to the burning coal with which the angel touched Isaiah’s lips. The fire accomplishes two purposes: 1) it cleanses, or purifies, both the lips and the message, and 2) it gives power, the power of the Holy Spirit of God to preach the Word with boldness and truth. The cleansing fire both sanctifies and commissions. …