Contradiction with Proverbs 17:13
Proverbs states that evil will not depart from the house of someone who repays good with evil, contradicting the call for mercy and forgiveness in Matthew 18:33.
Proverbs 17:13: Whoso rewardeth evil for good, evil shall not depart from his house.
Contradiction with Exodus 21:24
This verse promotes the concept of retributive justice ("eye for eye, tooth for tooth") unlike the compassionate forgiveness highlighted in Matthew 18:33.
Exodus 21:24: Eye for eye, tooth for tooth, hand for hand, foot for foot,
Contradiction with Proverbs 3:31
Advises not to envy the oppressor or choose his ways, a stance that may oppose the mercy and kindness expected in Matthew 18:33.
Proverbs 3:31: Envy thou not the oppressor, and choose none of his ways. [the oppressor: Heb. a man of violence]
Contradiction with Psalm 137:8-9
These verses speak of vengeance and retribution, in contrast with the forgiveness and compassion emphasized in Matthew 18:33.
Psalm 137:8-9: O daughter of Babylon, who art to be destroyed; happy [shall he be], that rewardeth thee as thou hast served us. [destroyed: Heb. wasted] [rewardeth...: Heb. recompenseth unto thee thy deed which thou didst to us]
Paradox #1
This verse might show a contradiction if someone argues that the call to show mercy or forgive is inconsistent with other biblical teachings on justice and punishment. While this verse emphasizes compassion and forgiveness, there are other parts of the Bible that focus on retribution and consequences for wrongdoing, which might seem conflicting to some.