2 Peter 1:9

7 and to godliness, brotherly kindness; and to brotherly kindness, love.

8 For if you possess these qualities and continue to grow in them, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ.

But whoever lacks these traits is nearsighted to the point of blindness, having forgotten that he has been cleansed from his past sins.

10 Therefore, brothers, strive to make your calling and election sure. For if you practice these things you will never stumble,

11 and you will receive a lavish reception into the eternal kingdom of our Lord and Savior Jesus Christ.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
But whoever lacks these traits is nearsighted to the point of blindness, having forgotten that he has been cleansed from his past sins.
KJV
But he that lacketh these things is blind, and cannot see afar off, and hath forgotten that he was purged from his old sins.
WEB
For he who lacks these things is blind, seeing only what is near, having forgotten the cleansing from his old sins.
ASV
For he that lacketh these things is blind, seeing only what is near, having forgotten the cleansing from his old sins.
DARBY
for he with whom these things are not present is blind, short-sighted, and has forgotten the purging of his former sins.
BLB
For in whomever these things are not present, he is blind, being shortsighted, having received forgetfulness of the cleansing [from] his former sins.
ÅB
for den som ikke har dette, er blind og nærsynt, etter at han har glemt at han er renset fra sine tidligere synder.
OTB
For den som mangler disse egenskapene er blind eller kortsynt, og har glemt renselsen fra sine tidligere synder.
B1930
for den som ikke har disse ting, han er blind, nærsynt, idet han har glemt renselsen fra sine fordums synder.

Study notes (Tyndale)

Original text and word study

Cross references