Contradiction with Romans 4:4
Romans 4:4 suggests that reward comes from obligation, not from individual work as stated in 1 Corinthians 3:8.
Romans 4:4: Now to him that worketh is the reward not reckoned of grace, but of debt.
Contradiction with Matthew 20:14-15
The parable implies that the reward is the same regardless of work, contradicting 1 Corinthians 3:8 where rewards are proportional.
Matthew 20:14-15: Take [that] thine [is], and go thy way: I will give unto this last, even as unto thee.
Contradiction with Luke 17:10
Suggests that after doing all commanded, the servant should not expect a reward, contrasting with the idea in 1 Corinthians 3:8.
Luke 17:10: So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do.
Contradiction with Ephesians 2:8-9
Emphasizes salvation as a gift, not based on works, which contrasts with the work-reward concept in 1 Corinthians 3:8.
Ephesians 2:8-9: For by grace are ye saved through faith; and that not of yourselves: [it is] the gift of God:
Contradiction with Titus 3:5
Asserts salvation is not due to works, opposing the proportional reward for labor in 1 Corinthians 3:8.
Titus 3:5: Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;