Contradiction with Matthew 5:44
Isaiah 49:2 mentions God making the speaker's mouth like a sharp sword, implying confrontation, whereas Matthew 5:44 advocates for loving enemies and suggests an approach of peace.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Proverbs 15:1
Isaiah 49:2 describes a sharp sword, symbolizing sharp words, but Proverbs 15:1 encourages soft answers to turn away wrath, prioritizing gentle speech over sharp words.
Proverbs 15:1: A soft answer turneth away wrath: but grievous words stir up anger.
Contradiction with Ephesians 4:29
While Isaiah 49:2 suggests the power of sharp words, Ephesians 4:29 advises against corrupt communication and promotes edifying speech instead.
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 1:19
Isaiah 49:2 conveys readiness to confront with words, but James 1:19 emphasizes being slow to speak and quick to listen, suggesting restraint in speech.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with Romans 12:18
Isaiah 49:2 suggests a warrior-like readiness in speech, whereas Romans 12:18 urges believers to live peaceably with all men, indicating a preference for peaceful relations.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.