Contradiction with Matthew 5:14
This verse talks about followers of Christ being the light of the world, implying openness, which contrasts with the secrecy of the thunders being instructed to be sealed in Revelation 10:4.
Matthew 5:14: Ye are the light of the world. A city that is set on an hill cannot be hid.
Contradiction with Matthew 10:27
This verse encourages proclaiming what is heard in secret, which contradicts the instruction to seal up and not write what the seven thunders uttered in Revelation 10:4.
Matthew 10:27: What I tell you in darkness, [that] speak ye in light: and what ye hear in the ear, [that] preach ye upon the housetops.
Contradiction with John 16:13
This verse mentions the Spirit of truth guiding into all truth, which seems to contrast with withholding the message of the seven thunders in Revelation 10:4.
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 Daniel 12:9
This verse speaks of words being closed up and sealed until the time of the end, which may seem similar in secrecy but ultimately suggests eventual revelation, contrasting the immediate secrecy in Revelation 10:4.
Daniel 12:9: And he said, Go thy way, Daniel: for the words [are] closed up and sealed till the time of the end.