What is the main theme of 1 Corinthians according to commentators?
A commentator cited on 1 Corinthians identifies wisdom as the main theme—specifically the wisdom of God set apart from the wisdom of men. This is especially seen in chapter 2, where Paul stresses that earthly wisdom is insufficient and only God's wisdom makes a person usable by God.
Les explains that a commentator he once read identified the main theme of 1 Corinthians as wisdom—the wisdom of God set apart from the wisdom of men. Les agrees in part, especially when Paul reaches chapter 2, where he stresses that it does not matter how much earthly wisdom a person has; only the wisdom from God makes someone something God can use. Les also connects this to the surrounding verses, noting that what man calls the foolishness of God is actually God's power to save a person from the most utter, gutter-type existence and make him a saint—something mankind considers foolish.
But unto them which are called, both Jews and Greeks, Christ the power of God, and the wisdom of God.