7 Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:   8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.

      Here the apostle exhorts them to purity, by purging out the old leaven. In this observe,

      I. The advice itself, addressed either, 1. To the church in general; and so purging out the old leaven, that they might be a new lump, refers to the putting away from themselves that wicked person, v. 13. Note, Christian churches should be pure and holy, and not bear such corrupt and scandalous members. They are to be unleavened, and should endure no such heterogeneous mixture to sour and corrupt them. Or, 2. To each particular member of the church. And so it implies that they should purge themselves from all impurity of heart and life, especially from this kind of wickedness, to which the Corinthians were addicted to a proverb. See the argument at the beginning. This old leaven was in a particular manner to be purged out, that they might become a new lump. Note, Christians should be careful to keep themselves clean, as well as purge polluted members out of their society. And they should especially avoid the sins to which they themselves were once most addicted, and the reigning vices of the places and the people where they live. They were also to purge themselves from malice and wickedness--all ill-will and mischievous subtlety. This is leaven that sours the mind to a great degree. It is not improbable that this was intended as a check to some who gloried in the scandalous behaviour of the offender, both out of pride and pique. Note, Christians should be careful to keep free from malice and mischief. Love is the very essence and life of the Christian religion. It is the fairest image of God, for God is love (1 John iv. 16), and therefore it is no wonder if it be the greatest beauty and ornament of a Christian. But malice is murder in its principles: He that hates his brother is a murderer (1 John iii. 15), he bears the image and proclaims him the offspring of him who was a murderer from the beginning, John viii. 44. How hateful should every thing be to a Christian that looks like malice and mischief.

      II. The reason with which this advice is enforced: For Christ our passover is sacrificed for us, v. 7. This is the great doctrine of the gospel. The Jews, after they had killed the passover, kept the feast of unleavened bread. So must we; not for seven days only, but all our days. We should die with our Saviour to sin, be planted into the likeness of his death by mortifying sin, and into the likeness of his resurrection by rising again to newness of life, and that internal and external. We must have new hearts and new lives. Note, The whole life of a Christian must be a feast of unleavened bread. His common conversation and his religious performances must be holy. He must purge out the old leaven, and keep the feast of unleavened bread of sincerity and truth. He must be without guilt in his conduct towards God and man. And the more there is of sincerity in our own profession, the less shall we censure that of others. Note, On the whole, The sacrifice of our Redeemer is the strongest argument with a gracious heart for purity and sincerity. How sincere a regard did he show to our welfare, in dying for us! and how terrible a proof was his death of the detestable nature of sin, and God's displeasure against it! Heinous evil, that could not be expiated but with the blood of the Son of God! And shall a Christian love the murderer of his Lord? God forbid.

      9 I wrote unto you in an epistle not to company with fornicators:   10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world.   11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.   12 For what have I to do to judge them also that are without? do not ye judge them that are within?   13 But them that are without God judgeth. Therefore put away from among yourselves that wicked person.

      Here the apostle advises them to shun the company and converse of scandalous professors. Consider,

      I. The advice itself: I wrote to you in a letter not to company with fornicators, v. 9. Some think this was an epistle written to them before, which is lost. Yet we have lost nothing by it, the Christian revelation being entire in those books of scripture which have come down to us, which are all that were intended by God for the general use of Christians, or he could and would in his providence have preserved more of the writings of inspired men. Some think it is to be understood of this very epistle, that he had written this advice before he had full information of their whole case, but thought it needful now to be more particular. And therefore on this occasion he tells them that if any man called a brother, any one professing Christianity, and being a member of a Christian church, were a fornicator, or covetous, or an idolater, or a railer, that they should not keep company with him, nor so much as eat with such a one. They were to avoid all familiarity with him; they were to have no commerce with him; they were to have no commerce with him: but, that they might shame him, and bring him to repentance, must disclaim and shun him. Note, Christians are to avoid the familiar conversation of fellow-christians that are notoriously wicked, and under just censure for their flagitious practices. Such disgrace the Christian name. They may call themselves brethren in Christ, but they are not Christian brethren. They are only fit companions for the brethren in iniquity; and to such company they should be left, till they mend their ways and doings.

      II. How he limits this advice. He does not forbid the Christians the like commerce with scandalously wicked heathens. He does not forbid their eating nor conversing with the fornicators of this world, &c. They know no better. They profess no better. The gods they serve, and the worship they render to many of them, countenance such wickedness. "You must needs go out of the world if you will have no conversation with such men. Your Gentile neighbours are generally vicious and profane; and it is impossible, as long as you are in the world, and have any worldly business to do, but you must fall into their company. This cannot be wholly avoided." Note, Christians may and ought to testify more respect to loose worldlings than to loose Christians. This seems a paradox. Why should we shun the company of a profane or loose Christian, rather than that of a profane or loose heathen?

      III. The reason of this limitation is here assigned. It is impossible the one should be avoided. Christians must have gone out of the world to avoid the company of loose heathens. But this was impossible, as long as they had business in the world. While they are minding their duty, and doing their proper business, God can and will preserve them from contagion. Besides, they carry an antidote against the infection of their bad example, and are naturally upon their guard. They are apt to have a horror at their wicked practices. But the dread of sin wears off by familiar converse with wicked Christians. Our own safety and preservation are a reason of this difference. But, besides, heathens were such as Christians had nothing to do to judge and censure, and avoid upon a censure passed; for they are without (v. 12), and must be left to God's judgment, v. 13. But, as to members of the church, they are within, are professedly bound by the laws and rules of Christianity, and not only liable to the judgment of God, but to the censures of those who are set over them, and the fellow-members of the same body, when they transgress those rules. Every Christian is bound to judge them unfit for communion and familiar converse. They are to be punished, by having this mark of disgrace put upon them, that they may be shamed, and, if possible, reclaimed thereby: and the more because the sins of such much more dishonour God than the sins of the openly wicked and profane can do. The church therefore is obliged to clear herself from all confederacy with them, or connivance at them, and to bear testimony against their wicked practices. Note, Though the church has nothing to do with those without, it must endeavour to keep clear of the guilt and reproach of those within.

      IV. How he applies the argument to the case before him: "Therefore put away from among yourselves that wicked person, v. 13. Cast him out of your fellowship, and avoid his conversation."