Contradiction with Matthew 6:5
This verse suggests that public declaration of faith, as the Pharisees do, is hypocritical, whereas 1 Corinthians 9:16 implies a compulsion to preach the gospel openly.
Matthew 6:5: And when thou prayest, thou shalt not be as the hypocrites [are]: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
Contradiction with Matthew 10:7-10
This passage emphasizes freely giving as received and suggests not taking provisions. In contrast, 1 Corinthians 9:16 indicates a necessity or obligation potentially implying a reward or necessity for preaching.
Matthew 10:7-10: And as ye go, preach, saying, The kingdom of heaven is at hand.
Contradiction with James 1:19
Advises being "slow to speak," focusing on listening, which could oppose the urgency to preach as expressed in 1 Corinthians 9:16.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with Ecclesiastes 3:7
Stresses that there is a time to keep silence, contrasting with the constant compulsion to preach in 1 Corinthians 9:16.
Ecclesiastes 3:7: A time to rend, and a time to sew; a time to keep silence, and a time to speak;
Contradiction with Amos 5:13
Recommends silence in an evil time, which might contradict the continuous need or urgency to preach suggested in 1 Corinthians 9:16.
Amos 5:13: Therefore the prudent shall keep silence in that time; for it [is] an evil time.
Paradox #1
The potential conflict with 1 Corinthians 9:16 could arise when considering the idea of free will in sharing the gospel. Some might see a tension between feeling a strong duty or necessity to preach and having the freedom to choose to do so. It raises questions about whether sharing the message should always come from personal choice or if it's an obligation imposed by one's beliefs.