Contradiction with Matthew 5:16
This verse emphasizes the importance of letting one's good works shine forth, whereas 2 Peter 1:9 discusses forgetting past sins, which might imply a lack of visible virtue.
Matthew 5:16: Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.
Contradiction with Galatians 2:16
It stresses justification by faith rather than works, possibly opposing the implication in 2 Peter 1:9 that recalling past purification is tied to one's spiritual state.
Galatians 2:16: Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.
Contradiction with James 2:17
Highlights faith being dead without works, potentially contradicting the idea in 2 Peter 1:9 that seems to focus on knowledge of purification over ongoing deeds.
James 2:17: Even so faith, if it hath not works, is dead, being alone. [alone: Gr. by itself]
Contradiction with Ephesians 2:8-9
Focuses on salvation by grace through faith, contrasting with the implication in 2 Peter 1:9 that remembering one's cleansing affects their spiritual standing.
Ephesians 2:8-9: For by grace are ye saved through faith; and that not of yourselves: [it is] the gift of God: