Contradiction with James 1:19
This verse advises being quick to listen, which contrasts with avoiding hearing everything people say as implied in Ecclesiastes 7:21.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with Proverbs 27:6
This verse emphasizes the value of honest rebuke from a friend, contrary to ignoring others' words.
Proverbs 27:6: Faithful [are] the wounds of a friend; but the kisses of an enemy [are] deceitful. [deceitful: or, earnest, or, frequent]
Contradiction with Matthew 12:36
This verse warns about being accountable for every idle word spoken, which contradicts the notion of not listening to all words.
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 Proverbs 15:31
This verse states the benefit of listening to life-giving rebukes, opposed to not taking all words to heart.
Proverbs 15:31: The ear that heareth the reproof of life abideth among the wise.
Contradiction with Matthew 18:15
This encourages confronting a brother when he sins, suggesting engagement with words, unlike the approach in Ecclesiastes 7:21.
Matthew 18:15: Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.
Paradox #1
The potential contradiction in that verse could be the tension between not taking to heart everything people say and the importance of being attentive and considerate in our relationships with others. This can be seen as conflicting advice, suggesting both awareness and disregard.