Contradiction with Jeremiah 15:6
While Isaiah 40:1 speaks of comfort, Jeremiah 15:6 mentions God being weary of relenting, suggesting a lack of comfort or forgiveness.
Jeremiah 15:6: Thou hast forsaken me, saith the LORD, thou art gone backward: therefore will I stretch out my hand against thee, and destroy thee; I am weary with repenting.
Contradiction with Luke 12:51
Isaiah 40:1 offers comfort, whereas Luke 12:51 states Jesus came to bring division, not peace or comfort.
Luke 12:51: Suppose ye that I am come to give peace on earth? I tell you, Nay; but rather division:
Contradiction with James 4:9
Isaiah 40:1 is about comfort, yet James 4:9 calls for mourning and gloom, which contradicts the notion of comfort.
James 4:9: Be afflicted, and mourn, and weep: let your laughter be turned to mourning, and [your] joy to heaviness.
Contradiction with Jeremiah 4:8
Comfort is promised in Isaiah 40:1, but Jeremiah 4:8 advises putting on sackcloth for mourning, indicating distress instead of comfort.
Jeremiah 4:8: For this gird you with sackcloth, lament and howl: for the fierce anger of the LORD is not turned back from us.
Contradiction with Matthew 10:34
Isaiah speaks of comfort, while Matthew 10:34 mentions Jesus bringing a sword, symbolizing conflict rather than peace or comfort.
Matthew 10:34: Think not that I am come to send peace on earth: I came not to send peace, but a sword.