Contradiction with Matthew 5:48
2 Peter 3:18 emphasizes growth in grace and knowledge, a continuous process, whereas Matthew 5:48 commands believers to be perfect, implying a completed state.
Matthew 5:48: Be ye therefore perfect, even as your Father which is in heaven is perfect.
Contradiction with Proverbs 4:7
2 Peter 3:18 encourages growth in knowledge, while Proverbs 4:7 suggests wisdom is the principal thing, placing it above mere knowledge.
Proverbs 4:7: Wisdom [is] the principal thing; [therefore] get wisdom: and with all thy getting get understanding.
Contradiction with Ecclesiastes 1:18
2 Peter 3:18 promotes increasing in knowledge, but Ecclesiastes 1:18 notes that in much wisdom and knowledge is much grief, suggesting a negative consequence.
Ecclesiastes 1:18: For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow.
Contradiction with 1 Corinthians 8:1
2 Peter 3:18 encourages growth in knowledge, whereas 1 Corinthians 8:1 warns that knowledge can lead to pride.
1 Corinthians 8:1: Now as touching things offered unto idols, we know that we all have knowledge. Knowledge puffeth up, but charity edifieth.
Contradiction with 1 Corinthians 14:20
2 Peter 3:18 suggests growth, but 1 Corinthians 14:20 calls for maturity rather than continuous growth, emphasizing a state of being rather than a process.
1 Corinthians 14:20: Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men. [men: Gr. perfect, or, of a ripe age]