Contradiction with 1 Timothy 5:18
Paul states in 1 Corinthians 9:18 that he does not charge for preaching, while 1 Timothy 5:18 supports compensating those who labor in preaching and teaching.
1 Timothy 5:18: For the scripture saith, Thou shalt not muzzle the ox that treadeth out the corn. And, The labourer [is] worthy of his reward.
Contradiction with Luke 10:7
Paul emphasizes not taking payment in 1 Corinthians 9:18, whereas Luke 10:7 advocates for workers, including preachers, to be compensated.
Luke 10:7: And in the same house remain, eating and drinking such things as they give: for the labourer is worthy of his hire. Go not from house to house.
Contradiction with Matthew 10:10
1 Corinthians 9:18 mentions that Paul presents the gospel freely, but Matthew 10:10 implies that a worker, such as a preacher, is entitled to support.
Matthew 10:10: Nor scrip for [your] journey, neither two coats, neither shoes, nor yet staves: for the workman is worthy of his meat. [staves: Gr. a staff]
Paradox #1
1 Corinthians 9:18 might pose a contradiction for some people because it could suggest that spreading religious teachings should not involve seeking financial gain or personal benefit. However, in practice, many religious leaders and organizations do accept donations and support, which may seem inconsistent with the idea of offering the gospel freely. This could be seen as a conflict between the ideal of selfless service and the practical needs of maintaining a ministry.