{8} Purge out therefore the old leaven, that ye may be a new {e} lump, as ye are unleavened. For even Christ our {f} passover is sacrificed for us:

(8) By alluding to the ceremony of the passover, he exhorts them to cast out that unclean person from among them. In times past, he says, it was not lawful for those who celebrated the passover to eat unleavened bread, insomuch that he was held as unclean and unworthy to eat the passover, whoever had but tasted of leaven. Now our whole life must be as it were the feast of unleavened bread, in which all they that are partakers of that immaculate lamb which is slain, must cast out both of themselves, and also out of their houses and congregations, all impurity.

(e) By lump he means the whole body of the Church, every member of which must be unleavened bread, that is, be renewed in spirit, by plucking away the old corruption.

(f) The Lamb of our passover.

People's New Testament

5:7 Purge out therefore the old leaven. Let the leaven of impurity be removed, by putting out the fornicator, that the church may be pure from the impure leaven, or influence. So, too, each one must cleanse his own heart.

For even Christ our passover is sacrificed for us. At the passover, Jews were required to put all leaven from their houses (Ex 12:15). As we have a Paschal Lamb, slain for us, the church should cleanse out the leaven of sin.

Wesley's Notes

5:7 Purge out therefore the old leaven - Both of sinners and of sin. That ye may be a new lump, as ye are unleavened - That is, that being unleavened ye may be a new lump, holy unto the Lord. For our passover is slain for us - The Jewish passover, about the time of which this epistle was wrote, 1Cor 5:11, was only a type of this. What exquisite skill both here and everywhere conducts the zeal of the inspired writer! How surprising a transition is here, and yet how perfectly natural! The apostle, speaking of the incestuous criminal, slides into his darling topic, - crucified Saviour. Who would have expected it on such an occasion. Yet, when it is thus brought in, who does not see and admire both the propriety of the subject, and the delicacy of its introduction?

King James Translators' Notes

is sacrificed; or, is slain

Jamieson-Fausset-Brown Bible Commentary

7. old leaven-The remnant of the "old" (Eph 4:22-24) heathenish and natural corruption. The image is taken from the extreme care of the Jews in searching every corner of their houses, and "purging out" every particle of leaven from the time of killing the lamb before the Passover (De 16:3, 4). So Christians are continually to search and purify their hearts (Ps 139:23, 24).

as ye are unleavened-normally, and as far as your Christian calling is concerned: free from the leaven of sin and death (1Co 6:11). Paul often grounds exhortations on the assumption of Christian professors' normal state as realized (Ro 6:3, 4) [Alford]. Regarding the Corinthian Church as the Passover "unleavened lump" or mass, he entreats them to correspond in fact with this their normal state. "For Christ our Passover (Ex 12:5-11, 21-23; Joh 1:29) has been (English Version, "is") sacrificed for us"; that is, as the Jews began the days of unleavened bread with the slaying of the Passover lamb, so, Christ our Passover having been already slain, let there be no leaven of evil in you who are the "unleavened lump." Doubtless he alludes to the Passover which had been two or three weeks before kept by the Jewish Christians (1Co 16:8): the Gentile Christians probably also refraining from leavened bread at the love-feasts. Thus the Jewish Passover naturally gave place to our Christian Easter. The time however, of keeping feast (metaphorical; that is, leading the Christian life of joy in Christ's finished work, compare Pr 15:15) among us Christians, corresponding to the Jewish Passover, is not limited, as the latter, to one season, but is ALL our time; for the transcendent benefits of the once-for-all completed sacrifice of our Passover Lamb extends to all the time of our lives and of this Christian dispensation; in no part of our time is the leaven of evil to be admitted.

For even-an additional reason, besides that in 1Co 5:6, and a more cogent one for purging out every leaven of evil; namely, that Christ has been already sacrificed, whereas the old leaven is yet unremoved, which ought to have been long ago purged out.

Matthew Henry's Concise Commentary

5:1-8 The apostle notices a flagrant abuse, winked at by the Corinthians. Party spirit, and a false notion of Christian liberty, seem to have saved the offender from censure. Grievous indeed is it that crimes should sometimes be committed by professors of the gospel, of which even heathens would be ashamed. Spiritual pride and false doctrines tend to bring in, and to spread such scandals. How dreadful the effects of sin! The devil reigns where Christ does not. And a man is in his kingdom, and under his power, when not in Christ. The bad example of a man of influence is very mischievous; it spreads far and wide. Corrupt principles and examples, if not corrected, would hurt the whole church. Believers must have new hearts, and lead new lives. Their common conversation and religious deeds must be holy. So far is the sacrifice of Christ our Passover for us, from rendering personal and public holiness unnecessary, that it furnishes powerful reasons and motives for it. Without holiness we can neither live by faith in him, nor join in his ordinances with comfort and profit.