I need not remind you how vivid and profoundly significant that emblem of leaven, as applied to all manner of evil, is.  But let me remind you how, just as in the Jewish Ritual, the cleansing from all that was leavened was the essential pre-requisite to the participation in the feast, feeding on Jesus Christ, as I have tried to describe it, is absolutely impossible unless our leaven is cleansed away.  Children spoil their appetites for wholesome food by eating sweetmeats.  Men destroy their capacity for feeding on Christ by hungry desires, and gluttonous satisfying of those desires with the delusive sweets of this passing world.  But, my brother, your experience, if you are a Christian man at all, will tell you that in the direct measure in which you have been drawn away into paltering with evil, your appetite for Christ and your capacity for gazing upon Him, contemplating Him, feeding on Him, has died out.  There comes a kind of constriction in a man’s throat when he is hungering after lesser good, especially when there is a tinge of evil in the supposed good that he is hungering after, which incapacitates Him from eating the bread of God, which is Jesus Christ.

But let us remember that absolute cleansing from all sin is not essential, in order to have real participation in Jesus Christ.  The Jew had to take every scrap of leaven out of his house before he began the Passover.  If that were the condition for us, alas! for us all; but the effort after purity, though it has not entirely attained its aim, is enough.  Sin abhorred does not prevent a man from participating in the Bread that came down from heaven.

Then observe, too, that for this power to cleanse ourselves, we must have had some participation in Christ, by which there is given to us that new life that conquers evil.  In the words immediately preceding my text, the Apostle bases his injunction to purge out the old leaven on the fact that ‘ye are unleavened.’  Ideally, in so far as the power possessed by them was concerned, these Corinthians were unleavened, even whilst they were bid to purge out the leaven.  That is to say, be what you are; realise your ideal, utilise the power you possess, and since by your faith there has been given to you a new life that can conquer all corruption and sin, see that you use the life that is given.  Purge out the old leaven because ye are unleavened.

One last word—­this stringent exhortation, which makes Christian effort after absolute purity a Christian duty, and the condition of participation in the Paschal Lamb, is based upon that thought to which I have already referred, of the diabolical power of infection which Evil possesses.  Either you must cast it out, or it will choke the better thing in you.  It spreads and grows, and propagates itself, and works underground through and through the whole mass.  A water-weed got into some of our canals years ago, and it has all but choked some of them.  The slime on a pond spreads its green mantle over