Contradiction with 1 Corinthians 1:18
The concept of the cross being foolishness to those who perish contrasts with the idea of seeking understanding exemplified in John 3 where Nicodemus seeks Jesus.
1 Corinthians 1:18: For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.
Contradiction with Matthew 13:13
Jesus speaks in parables so that seeing, they do not see, contrasting with Nicodemus' desire to understand what Jesus is expressing.
Matthew 13:13: Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.