Contradiction with James 1:6
This verse emphasizes the need for unwavering faith, which may seem in contrast to the crowd's faith being based on a miraculous sign in John 12:18.
James 1:6: But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.
Contradiction with Matthew 12:39
Jesus criticizes those seeking signs, whereas John 12:18 notes a crowd gathered because of a miraculous sign.
Matthew 12:39: But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas:
Contradiction with Hebrews 11:1
Highlights faith in the unseen, while John 12:18 describes belief due to a seen miracle.
Hebrews 11:1: Now faith is the substance of things hoped for, the evidence of things not seen. [substance: or, ground, or, confidence]
Contradiction with 1 Corinthians 1:22
States that Jews seek signs, which is demonstrated in John 12:18 but is highlighted as problematic elsewhere.
1 Corinthians 1:22: For the Jews require a sign, and the Greeks seek after wisdom: