"Clean out the old yeast," Paul says in verse 7. It is a call, in symbolic terms, to purge oneself of evil. He then takes it one further step, saying that the immoral person should be put out of the congregation. He commands this because the person's immorality contradicts everything that the church teaches, and if the person remains in the congregation, it will become spiritually contaminated and will no longer be able to consider itself as Christian. An immoral "member" is a blot on the integrity of the church.
John W. Ritenbaugh
New Covenant Priesthood (Part 2)
The Days of Unleavened Bread are a memorial to God's law and to His powerful deliverance from Egypt and bondage. Paul explains this significance to the Corinthians and the urgency attached to cease sinning. He says we should not even keep company with a brother involved in flagrant sin! Also, by ridding our homes of sin, we realize that overcoming sin is hard work!
Holy Days: Unleavened Bread
Other Forerunner Commentary entries containing 1 Corinthians 5:9:
2 Corinthians 6:14-17
2 Corinthians :