Contradiction with Matthew 13:16-17
This verse states that the disciples are blessed because they see and hear the things that many prophets and righteous men desired to see and hear, suggesting that things prepared by God have been revealed to some people, which contradicts the assertion that no eye has seen or ear heard.
Matthew 13:16-17: But blessed [are] your eyes, for they see: and your ears, for they hear.
Contradiction with 1 Corinthians 2:10
This verse immediately follows 1 Corinthians 2:9 and states that God has revealed these things to us by His Spirit, which contradicts the idea that these things have not been revealed to anyone.
1 Corinthians 2:10: But God hath revealed [them] unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God.
Contradiction with John 16:13
This verse speaks about the Spirit of truth guiding believers into all truth, indicating that there is revelation available to believers that contradicts the notion of things being unseen and unheard.
John 16:13: Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, [that] shall he speak: and he will shew you things to come.
Contradiction with Ephesians 3:3-5
These verses talk about the mystery that has been revealed to apostles and prophets by the Spirit, suggesting that the hidden wisdom of God can be known, which contradicts the idea of it being unknowable.
Ephesians 3:3-5: How that by revelation he made known unto me the mystery; (as I wrote afore in few words, [afore...: or, a little before]
Contradiction with Matthew 11:25
This verse implies that certain spiritual truths have been revealed to babes and hidden from the wise, which contradicts the statement that such truths have not been seen or heard by anyone.
Matthew 11:25: At that time Jesus answered and said, I thank thee, O Father, Lord of heaven and earth, because thou hast hid these things from the wise and prudent, and hast revealed them unto babes.