1 John 1:6

If we say that we have fellowship with him, and walk in darkness, we lie and observe not the truth;

1 John 4:20

If any one says, I love God, and hates his brother, he is a liar; for he that loves not his brother whom he has seen, how can he love God whom he has not seen?

1 John 1:10

If we say that we have not sinned, we make him a liar, and his word is not in us.

John 3:19-21

And this is the judgment; that the light has come into the world, and men loved darkness rather than the light, because their deeds are evil.

John 12:35

Then Jesus said to them, Yet a little while is the light with you; walk while you have the light, that darkness may not overtake you; for he that walks in darkness knows not where he goes.

1 John 2:4

He that says, I have known him, and keeps not his commandments, is a liar, and the truth is not in him;

Revelation 3:17-18

For you say, I am rich and have become rich and have need of nothing, and know not that you are miserable, and pitiable, and poor, and blind, and naked.

Matthew 7:22

Many will say to me in that day, Lord, Lord, have we not prophesied in your name, and in your name cast out demons, and in your name performed many mighty works?

John 8:12

THEN Jesus spoke to them again, saying, I am the light of the world; he that follows me shall not walk in darkness but shall have the light of life.

John 8:44-45

You are of your father the devil, and the desires of your father you will to do. He was a murderer from the beginning and stood not by the truth; for truth is not in him. When he speaks a lie, he speaks from his own; for he is a liar, and the father of him [that lies].

John 11:10

but if he walks in the night he stumbles, because the light is not in it.

John 12:46

I have come a light into the world, that no one who believes in me should continue in darkness.

2 Corinthians 6:14-16

Be not unequally yoked with unbelievers; for what participation has righteousness with wickedness? or what communion has light with darkness?

1 Timothy 4:2

[misled] by the hypocrisy of false teachers, whose consciences are cauterized,

James 2:14

What is the profit, my brothers, if a man says he has faith, but has not works? Can faith save him?

James 2:16

and one of you says to them, Go in peace, be warmed and be filled, but gives them not the necessary supplies for the body, what is the profit?

James 2:18

But some one will say, You have faith, and I have works; show me your faith without works, and I will show you my faith by works.

1 John 1:8

If we say we have not sin, we deceive ourselves, and the truth is not in us.

1 John 2:9-11

He that says he is in the light, and hates his brother, is in darkness till now.

Treasury of Scripture Knowledge

Summary

If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:

Fellowship

Do not

Bible References

If

1 John 1:8
If we say we have not sin, we deceive ourselves, and the truth is not in us.
1 John 2:4
He that says, I have known him, and keeps not his commandments, is a liar, and the truth is not in him;
1 John 4:20
If any one says, I love God, and hates his brother, he is a liar; for he that loves not his brother whom he has seen, how can he love God whom he has not seen?
Matthew 7:22
Many will say to me in that day, Lord, Lord, have we not prophesied in your name, and in your name cast out demons, and in your name performed many mighty works?
James 2:14
What is the profit, my brothers, if a man says he has faith, but has not works? Can faith save him?
Revelation 3:17
For you say, I am rich and have become rich and have need of nothing, and know not that you are miserable, and pitiable, and poor, and blind, and naked.

Fellowship

2 Corinthians 6:14
Be not unequally yoked with unbelievers; for what participation has righteousness with wickedness? or what communion has light with darkness?

We lie

1 John 1:10
If we say that we have not sinned, we make him a liar, and his word is not in us.
1 John 4:20
If any one says, I love God, and hates his brother, he is a liar; for he that loves not his brother whom he has seen, how can he love God whom he has not seen?
John 8:44
You are of your father the devil, and the desires of your father you will to do. He was a murderer from the beginning and stood not by the truth; for truth is not in him. When he speaks a lie, he speaks from his own; for he is a liar, and the father of him [that lies].
1 Timothy 4:2
[misled] by the hypocrisy of false teachers, whose consciences are cauterized,

Do not

John 3:21
but he that does good comes to the light, that his deeds may be made manifest, for they are wrought in God.