Idolatry has an impact on later generations, and so it matters a great deal if we associate closely with idolaters. Children learn by example, and if their parents set the example that physical objects have excessive importance, then their children will pass down the same values. When we socialize with idolaters, we share in their ways. If we are not careful, we may also begin to share their idols.
Martin G. Collins
The Second Commandment
"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)
An extortioner obtains things from others by force, intimidation, or undue power. Parents can train a child to extort if they give him everything he demands through his cries and tantrums. That child is stealing what he wants from his parents. Christ condemns the Pharisees for extorting from the people. They used their office to intimidate the people into giving offerings (Matthew 23:25). Christ admonishes the tax collector to avoid stealing from people by not collecting more than his due (Luke 3:12-13).
Martin G. Collins
The Eighth Commandment
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 5:11: