Contradiction with 1 Corinthians 15:54
This verse speaks of mortality being swallowed up by immortality, suggesting that eternal life is not yet fully revealed or accessible until a future time, which can contrast with 1 John 1:2 where eternal life is manifested in the present through Jesus.
1 Corinthians 15:54: So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.
Contradiction with Romans 6:23
This verse emphasizes that eternal life is a gift from God through Jesus Christ, potentially contrasting with the idea that eternal life can be visibly manifested or witnessed as stated in 1 John 1:2.
Romans 6:23: For the wages of sin [is] death; but the gift of God [is] eternal life through Jesus Christ our Lord.