2 Peter 1:9

For he who lacks these things is blind, seeing only what is near, having forgotten the cleansing from his old sins.

Ephesians 5:26

that he might sanctify it, having cleansed it by the washing of water with the word,

Hebrews 9:14

how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, cleanse your conscience from dead works to serve the living God?

1 John 1:7

But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin.

1 John 2:9-11

He who says he is in the light and hates his brother, is in the darkness even until now.

Mark 10:21

Jesus looking at him loved him, and said to him, "One thing you lack. Go, sell whatever you have, and give to the poor, and you will have treasure in heaven; and come, follow me, taking up the cross."

Luke 18:22

When Jesus heard these things, he said to him, "You still lack one thing. Sell all that you have, and distribute it to the poor. You will have treasure in heaven. Come, follow me."

John 9:40-41

Those of the Pharisees who were with him heard these things, and said to him, "Are we also blind?"

Romans 6:1-4

What shall we say then? Shall we continue in sin, that grace may abound?

Romans 6:11

Thus consider yourselves also to be dead to sin, but alive to God in Christ Jesus our Lord.

2 Corinthians 4:3-4

Even if our Good News is veiled, it is veiled in those who perish;

Galatians 5:6

For in Christ Jesus neither circumcision amounts to anything, nor uncircumcision, but faith working through love.

Galatians 5:13

For you, brothers, were called for freedom. Only don't use your freedom for gain to the flesh, but through love be servants to one another.

Titus 2:14

who gave himself for us, that he might redeem us from all iniquity, and purify for himself a people for his own possession, zealous for good works.

James 2:14-26

What good is it, my brothers, if a man says he has faith, but has no works? Can faith save him?

1 Peter 3:21

This is a symbol of baptism, which now saves you -- not the putting away of the filth of the flesh, but the answer of a good conscience toward God, through the resurrection of Jesus Christ,

2 Peter 1:4-7

by which he has granted to us his precious and exceedingly great promises; that through these you may become partakers of the divine nature, having escaped from the corruption that is in the world by lust.

2 Peter 2:18-20

For, uttering great swelling words of emptiness, they entice in the lusts of the flesh, by licentiousness, those who are indeed escaping from those who live in error;

Revelation 3:17

Because you say, 'I am rich, and have gotten riches, and have need of nothing;' and don't know that you are the wretched one, miserable, poor, blind, and naked;

Treasury of Scripture Knowledge

Summary

But he that lacketh these things is blind, and cannot see afar off, and hath forgotten that he was purged from his old sins.

Bible References

Lacketh

2 Peter 1:5
Yes, and for this very cause adding on your part all diligence, in your faith supply moral excellence; and in moral excellence, knowledge;
Mark 10:21
Jesus looking at him loved him, and said to him, "One thing you lack. Go, sell whatever you have, and give to the poor, and you will have treasure in heaven; and come, follow me, taking up the cross."
Luke 18:22
When Jesus heard these things, he said to him, "You still lack one thing. Sell all that you have, and distribute it to the poor. You will have treasure in heaven. Come, follow me."
Galatians 5:6
For in Christ Jesus neither circumcision amounts to anything, nor uncircumcision, but faith working through love.
James 2:14
What good is it, my brothers, if a man says he has faith, but has no works? Can faith save him?

Blind

John 9:40
Those of the Pharisees who were with him heard these things, and said to him, "Are we also blind?"
2 Corinthians 4:3
Even if our Good News is veiled, it is veiled in those who perish;
1 John 2:9
He who says he is in the light and hates his brother, is in the darkness even until now.
Revelation 3:17
Because you say, 'I am rich, and have gotten riches, and have need of nothing;' and don't know that you are the wretched one, miserable, poor, blind, and naked;

That he

2 Peter 1:4
by which he has granted to us his precious and exceedingly great promises; that through these you may become partakers of the divine nature, having escaped from the corruption that is in the world by lust.
2 Peter 2:18
For, uttering great swelling words of emptiness, they entice in the lusts of the flesh, by licentiousness, those who are indeed escaping from those who live in error;
Romans 6:1
What shall we say then? Shall we continue in sin, that grace may abound?
Ephesians 5:26
that he might sanctify it, having cleansed it by the washing of water with the word,
Hebrews 9:14
how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, cleanse your conscience from dead works to serve the living God?
1 Peter 3:21
This is a symbol of baptism, which now saves you -- not the putting away of the filth of the flesh, but the answer of a good conscience toward God, through the resurrection of Jesus Christ,
1 John 1:7
But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin.

General references

Deuteronomy 6:17
You shall diligently keep the commandments of Yahweh your God, and his testimonies, and his statutes, which he has commanded you.
Ecclesiastes 10:18
By slothfulness the roof sinks in; and through idleness of the hands the house leaks.
Luke 11:35
Therefore see whether the light that is in you isn't darkness.