Contradiction with Matthew 12:36
This verse highlights that every idle word spoken will be accounted for in judgment, suggesting that words have consequences beyond just filling one's belly, unlike the positive outcome implied in Proverbs 18:20.
Matthew 12:36: But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment.
Contradiction with Ephesians 4:29
This verse instructs to let no corrupt communication proceed from the mouth, which contradicts Proverbs 18:20 by focusing on the quality and impact of words rather than their productiveness or personal benefit.
Ephesians 4:29: Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers. [to...: or, to edify profitably]
Contradiction with James 3:5
Here, the tongue is described as a small member that can boast great things and cause significant damage, countering the notion that words will simply fill one's belly with their fruit as implied in Proverbs 18:20.
James 3:5: Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth! [a matter: or, wood]
Contradiction with Proverbs 13:3
This verse implies that guarding your mouth preserves your life, contrasting with Proverbs 18:20, which suggests that the fruit of one's mouth is inherently fulfilling or beneficial.
Proverbs 13:3: He that keepeth his mouth keepeth his life: [but] he that openeth wide his lips shall have destruction.
Contradiction with Matthew 15:11
It claims that what goes into the mouth doesn't defile a man, but rather what comes out of the mouth defiles him. This view portrays words as having a potentially harmful impact, contrary to the positive aspect described in Proverbs 18:20.
Matthew 15:11: Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.
Contradiction with James 1:26
This verse states that if anyone considers themselves religious but does not bridle their tongue, their religion is worthless. This contradicts Proverbs 18:20 by showing that not all spoken words contribute positively, as some can nullify one's religious value.
James 1:26: If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion [is] vain.