Brethren, for a man by his own unaided effort, however powerful, continuous, and wisely directed it may be, to cleanse himself utterly from his iniquity, is as hopeless as it would be for him to sit down with a hammer and a chisel and try by mechanical means to get all the iron out of a piece of ironstone. The union is chemical, not mechanical. And so hammers and chisels will only get a very little of the metal out. The one solvent is fire. Put the obstinate crude ore into your furnace, and get the temperature up, and the molten metal will run clear. There should be mountains of scoriae, the dross and relics of our abandoned sins, around us all. If we desire to be delivered, let us go into the fire. It will burn up all our evil, and it will burn up nothing else. Keep close to Christ. Lay your hearts open to the hallowing influences of the motives and the examples that lie in the story of His life and death. Seek for the fiery touch of that transforming Spirit, and be sure that you quench Him not, nor grieve Him. And then your weakness will be reinvigorated by celestial powers, and the live coal upon your lips will burn up all your iniquity. But, subordinately to this deepest meaning, as I take it, of the great symbol of our text, let me remind you of another possible application of it, which follows from the preceding. God's Spirit cleanses men mainly by raising their spirits to a higher temperature. For coldness is akin to sin, and heavenly warmth is akin to righteousness. Enthusiasm always ennobles, delivers men, even on the lower reaches of life and conduct from many a meanness and many a sin. And when it becomes a warmth of spirit kindled by the reception of the fire of God, then it becomes the solvent which breaks the connection between me and my evil. It is the cold Christian who makes no progress in conquering his sin. The one who is filled with the love of God, and has the ardent convictions and the burning enthusiasm which that love ought to produce in our hearts, is the man who will conquer and eject his evils.