1 John 1:8

If we say, "We are without any sin," we are deceiving ourselves, and there is no truth in our hearts.

James 3:2

For we all make many mistakes. Anyone who never makes a mistake in what he says has a character that is fully developed and is able to control his whole body as well.

1 John 2:4

Whoever says, "I know him," but does not obey his commands, is a liar, and there is no truth in his heart;

Romans 3:23

For all men sin and come short of the glory of God,

1 Corinthians 3:18

Let no one of you deceive himself. If any one of you imagines that he is wiser than the rest of you, in what this world calls wisdom, he had better become a fool, so as to become really wise.

Galatians 6:3

For if anyone thinks he is somebody when he is really nobody, he is deceiving himself.

1 Timothy 6:5

and mutual irritation between people of depraved minds, who are lost to the truth and think of religion only as a means of gain.

2 Timothy 3:13

and bad men and impostors will go on from bad to worse, deceiving others and deceived themselves.

James 1:22

Obey the message; do not merely listen to it, and deceive yourselves.

James 1:26

If anyone thinks he is religious, and does not bridle his tongue, but deceives himself, his religious observances are of no account.

2 Peter 2:13

suffering wrong as the reward for their wrongdoing. They find pleasure in the indulgence of the moment; they are a stain and a disgrace, and they revel in their deceit while they join in your religious meals.

1 John 1:6

If we say, "We have fellowship with him," and yet live in darkness, we are lying and not living the truth.

1 John 1:10

If we say, "We have not sinned," we are making him a liar, and his message is not in our hearts.

1 John 3:5-6

You know that he appeared to take our sins away, and that there is no sin in him.

3 John 1:3

For it makes me exceedingly happy to have some brothers come and testify to the truth of your life, for you are guided by truth.

Treasury of Scripture Knowledge

Summary

If we say that we have no sin, we deceive ourselves, and the truth is not in us.

General references

Bible References

Say

1 John 1:6
If we say, "We have fellowship with him," and yet live in darkness, we are lying and not living the truth.
1 John 3:5
You know that he appeared to take our sins away, and that there is no sin in him.
Romans 3:23
For all men sin and come short of the glory of God,
James 3:2
For we all make many mistakes. Anyone who never makes a mistake in what he says has a character that is fully developed and is able to control his whole body as well.

We deceive

1 Corinthians 3:18
Let no one of you deceive himself. If any one of you imagines that he is wiser than the rest of you, in what this world calls wisdom, he had better become a fool, so as to become really wise.
Galatians 6:3
For if anyone thinks he is somebody when he is really nobody, he is deceiving himself.
2 Timothy 3:13
and bad men and impostors will go on from bad to worse, deceiving others and deceived themselves.
James 1:22
Obey the message; do not merely listen to it, and deceive yourselves.
2 Peter 2:13
suffering wrong as the reward for their wrongdoing. They find pleasure in the indulgence of the moment; they are a stain and a disgrace, and they revel in their deceit while they join in your religious meals.

General references

Hebrews 8:12
For I will be merciful to their misdeeds, And I will no longer remember their sins.' "