Contradiction with Genesis 1:1
Genesis 1:1 starts with the creation of the world, whereas 1 John 1:1 speaks of the Word being from the beginning, implying existence before creation.
Genesis 1:1: In the beginning God created the heaven and the earth.
Contradiction with John 1:14
John 1:14 states the Word became flesh, while 1 John 1:1 emphasizes the Word as always existing from the beginning, creating a contrast between incarnation and eternal existence.
John 1:14: And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
Contradiction with Colossians 1:16
Colossians 1:16 emphasizes that all things were created by the Word, contrasting with 1 John 1:1 which speaks to the existence of the Word before any act of creation.
Colossians 1:16: For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether [they be] thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
Contradiction with Hebrews 1:2
Hebrews 1:2 indicates that God has spoken through His Son, contrasting with 1 John 1:1 where the emphasis is on the Word being heard, seen, and handled from the beginning, suggesting a different understanding of revelation.
Hebrews 1:2: Hath in these last days spoken unto us by [his] Son, whom he hath appointed heir of all things, by whom also he made the worlds;
Contradiction with Revelation 22:13
Revelation 22:13 speaks of the Alpha and Omega, beginning and the end, suggesting a temporal beginning and end, whereas 1 John 1:1 suggests pre-existence without explicit reference to a starting or ending.
Revelation 22:13: I am Alpha and Omega, the beginning and the end, the first and the last.