Contradiction with Matthew 10:8
This verse encourages giving freely, without charge, which contrasts with the idea of Paul's concern in 2 Corinthians 12:13 about not being burdensome by taking support.
Matthew 10:8: Heal the sick, cleanse the lepers, raise the dead, cast out devils: freely ye have received, freely give.
Contradiction with Philippians 4:15-16
These verses praise the Philippians for supporting Paul financially, while in 2 Corinthians 12:13, he notes he didn't seek such support from the Corinthians.
Philippians 4:15-16: Now ye Philippians know also, that in the beginning of the gospel, when I departed from Macedonia, no church communicated with me as concerning giving and receiving, but ye only.
Contradiction with Acts 20:34-35
Paul speaks about working with his own hands to support himself, highlighting self-sufficiency, which might seem contrary to the concern in 2 Corinthians 12:13 about not asking the Corinthians for financial support.
Acts 20:34-35: Yea, ye yourselves know, that these hands have ministered unto my necessities, and to them that were with me.
Contradiction with 1 Corinthians 9:14
This verse supports the idea that those who preach the gospel should receive their living from it, while 2 Corinthians 12:13 emphasizes Paul not taking support from the church in Corinth.
1 Corinthians 9:14: Even so hath the Lord ordained that they which preach the gospel should live of the gospel.