I. And so the first point that I would ask you to notice here is--that fiery cleansing to which every Christian must yield. Now I have already referred to the relation between the words of my text and those immediately preceding, as being in some sense one of opposition and contrast. I think we are put on the right track for understanding the solemn words of this text if we remember the great saying of John the Baptist, where, in precisely similar fashion, there are set side by side the two conceptions of the chaff being cast into the unquenchable fire (the same expression as in our text), and 'He shall baptize you with the Holy Ghost and with fire.' The salting fire, then, which cleanses and preserves, and to which every Christian soul must submit itself, to be purged thereby, is, as I take it, primarily and fundamentally the fire of that Divine Spirit which Christ Himself told us that He had come to cast upon the earth, and yearned, in a passion of desire, to see kindled. The very frequent use of the emblem in this same signification throughout Scripture, I suppose I need not recall to you. It seems to me that the only worthy interpretation of the words before us, which goes down into their depths and harmonises with the whole of the rest of the teaching of Scripture, is that which recognises these words of my text as no unwelcome threat, as no bitter necessity, but as a joyful promise bringing to men, laden and burdened with their sins, the good news that it is possible for them to be purged from them entirely by the fiery ministration of that Divine Spirit. Just as we take a piece of foul clay and put it into the furnace, and can see, as it gets red-hot, the stains melt away, as a cloud does in the blue, from its surface, so if we will plunge ourselves into the influences of that divine power which Christ has come to communicate to the world, our sin and all our impurities will melt from off us, and we shall be clean. No amount of scrubbing with soap and water will do it. The stain is a great deal too deep for that, and a mightier solvent than any that we can apply, if unaided and unsupplied from above, is needed to make us clean. 'Who can bring a clean thing out of an unclean,' especially when the would-be bringer is himself the unclean thing? Surely not one. Unless there be a power _ab extra_, unparticipant of man's evils, and yet capable of mingling with the evil man's inmost nature, and dealing with it, then I believe that universal experience and our individual experience tell us that there is no hope that we shall ever get rid of our transgressions.