What does the Bible say about being short-sighted in faith?

In 2 Peter 1:9, the apostle Peter teaches that a believer who lacks virtues such as faith, virtue, knowledge, and self-control is considered short-sighted, even blind. This spiritual blindness stems from forgetting the purification of past sins, indicating a failure to grasp the transformative power of the gospel in their lives. The context surrounding this teaching emphasizes the need for growth in grace and knowledge of Jesus Christ, highlighting the importance of a vibrant faith that actively reflects Christ's character.