He had given instruction about this collection to the Corinthians earlier in 1 Cor 16:1-4 and indicated its importance by urging comparisons with the Macedonians in 2 Corinthians 8-9.
Martin, "Theology and Mission in 2 Corinthians," in The Gospel to the Nations: Perspectives on Paul's Mission, ed.
He maintains that Paul wrote 2 Corinthians to deal with two crises.
Part 1 sets forth Paul's presentation in 2 Corinthians 1-7.
The second part of the book deals with the linguistic background of "world" and "creation" in Greek and Hellenistic philosophy and the Septuagint and other Jewish writers, but the greater part of the book is devoted to a textual analysis of these terms in 1 Corinthians and Romans, though there is a very short chapter on Galatians and 2 Corinthians
David Aune explicates the anthropological duality evident in the eschatology of 2 Corinthians
4:16-5:10 by drawing on comparable notions of the relation between body and soul in Greco-Roman cosmology.
Koenig offers special insights in explaining how passages such as Romans 12 and 2 Corinthians
8-9 have allusions to eucharistic meals and how 1 Corinthians 11 through 14 are all descriptions of eucharistic practices of the Corinthian congregation.