2 Peter 1:4 provides the divine promises that enable growth—forgetting them leads to the blindness warned in verse 9.

2 Peter 1:5-7 supplies the list of virtues whose absence in verse 9 causes blindness and shortsightedness.

2 Peter 2:18-22 describes those who forget their cleansing and return to sin—the exact forgetfulness Peter warns against.

James 2:14-26 insists faith without works is dead—the same blindness and forgetfulness Peter describes.

1 John 2:9-11 links hatred to spiritual blindness—the same blindness Peter says results from lacking brotherly love.

Revelation 3:17 rebukes self-deceived blindness in Laodicea—echoing Peter's warning about forgetfulness and lack of virtues.

Luke 6:42 reinforces the theme of spiritual blindness — a person unable to see their own fault, paralleling the shortsightedness described here.

Hebrews 9:14 explains purification of conscience through Christ's blood, the basis for the cleansing Peter says believers received.

1 John 1:7 emphasizes ongoing cleansing by Jesus' blood, reinforcing the reality of the cleansing Peter warns against forgetting.

Luke 11:35 warns about inner darkness — mirroring the spiritual blindness and lack of vision described here.