Stephen J. Patterson publishes an article discussing the debate about the origins of 1 Corinthians 13:4-7; argues that the passage is not an interpolation.
Stephen J. Patterson, "A Rhetorical Gem in a Rhetorical Treasure: The Origin and Significance of 1 Corinthians 13:4—7," Biblical Theology Bulletin 39, no. 2 (2009): 87-94
Abstract
This essay argues that 1 Cor 13:4-7 is a rhetorical set piece developed in the wisdom school Paul assembled in Ephesus in the years immediately following his departure from Corinth. Paul might have composed it himself, but its vocabulary and structure suggest that a colleague created it, and Paul borrowed it as the center piece of his encomium on agape in 1 Corinthians 13. The fact that Paul and other members of the school devoted themselves to disciplined reflection on agape signals an importance and prominence to this concept that is often overlooked in Pauline scholarship.