I Corinthians 3:2

I have fed you with milk, and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able (KJV)

Then: After 18 months of Paul's one-on-one teaching and even after five years (Baker, p. 55) of experience, the Corinthians are still toddlers in the faith. What can Paul do since they have not listened to the Holy Spirit and waste time bickering with each other? The divide between where they are and where they should be is so significant, they are unable to carry out the mission of a church. Actually all Paul can do is provide revelations of insufficiency and encouragement to change. Change and growth come through individual convictions and relationship with the Holy Spirit. But Paul's teachings are throughout this letter are key to starting the process and providing measurement standards.

Now: This verse contains the classic standard of comparison which believers and church leaders use time after time, year after year, as a measure of spiritual growth. Where do believers stand? How do they measure up? Which practices reveal knowledge of the Word, its application, and ultimate purpose? Both poles are seen here - the maturity of Paul and the immaturity of the Corinthians. That's why all scripture is useful for inspiration and teaching.

Extra source: Cornerstone Biblical Commentary 1 Corinthians (William Baker), 2 Corinthians (Ralph Martin & Carl Toney), ed. by Philip Comfort. Carol Stream: Tyndale House Publishers, c2006.