(8) Old leaven--i.e., in their old state generally; and then the Apostle proceeds to particularise. Sincerity and truth are to take the place of malice and wickedness in the continuous life of the Christian. St. Chrysostom well remarks: "He said 'Let us keep the feast' as pointing out that the whole of time is a festival unto Christians, because of the excellence of the good things which have been given."

Verse 8. - Therefore let us keep the feast. Let us keep the Christian feast of Christ's resurrection in that spirit of holiness - of purging away sin from the midst of us - which was symbolized by the Jewish removal of leaven. Not with old leaven. For now ye are "in Christ," and, therefore, are a "new creation." Leaven is the type of hypocrisy (Luke 12:1) in its secret workings, but more generally it is a type of every corrupting influence. Of sincerity and truth. "All that corresponds to an unsullied, uncontaminated, and genuine Christian character." The beautiful Greek word for "sincerity" means freedom from all admixture. It is, perhaps, derived from "testing in the sunshine," and is used by St. Paul in 2 Corinthians 1:12; 2 Corinthians 2:17. "Truth" means "reality."

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.Therefore let us keep the feast,.... Not the feast of the passover, which was now ceased, though this is said in allusion to it; when the master of the house used to say (l),

"everyone that is hungry, let him come and eat; he that hath need, let him come "and paschatize", or keep the feast of the passover:''

but rather the feast of the Lord's supper is here meant, that feast of fat things Isaiah prophesied of; in which are the richest entertainments, even the flesh and blood of Christ; though it seems best to understand it of the whole course of a Christian's life, spent in the exercise of spiritual joy and faith in Christ; he that is of a merry heart, as the believer of all men in the world has reason to be of, "hath a continual feast", Proverbs 15:15 of spiritual mirth and pleasure, rejoicing always in Christ, as he ought to do: which feast, or course of life, is to be kept "not with old leaven"; in the old, vain, sinful manner of conversation, as before:

neither with the leaven of malice and wickedness; not in malice to any man, or one another, nor in any sort of wickedness, living in no known sin, and allowing of it:

but with the unleavened bread of sincerity; as opposed to malice, of sincere love to God and Christ, and to his people: and of truth; of Gospel doctrine, discipline, and conversation.

(l) Haggada Shel Pesach, p. 4. Ed. Rittangel.