1 John 1:6

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

1 John 4:20

If anyone says, I love God and hates his brother, he is a liar; for he that does not love 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 condemnation, that the light is come into the world, and men loved darkness more than the light because their deeds were evil.

John 12:35

Then Jesus said unto them, Yet a little while is the Light with you. Walk while ye have the light, lest darkness come upon you; for he that walks in darkness does not know where he goes.

1 John 2:4

He that says, I have known him, and does not keep his commandments, is a liar, and the truth is not in him.

Revelation 3:17-18

Because thou sayest, I am rich and increased with goods and have need of nothing and knowest not that thou art wretched and miserable and poor and blind and naked,

Psalm 5:4-6

For thou art not a God that loves wickedness; neither shall one who is evil dwell with thee.

Psalm 82:5

They do not know, neither do they understand; they walk in darkness; they move all the foundations of the earth.

Psalm 94:20

Shall the throne of iniquity have fellowship with thee, who creates toil under the guise of law?

Proverbs 2:13

who leave the paths of uprightness to walk in the ways of darkness,

Proverbs 4:18-19

But the path of the just is as the light of the morning star, that shines more and more until the day is perfect.

Matthew 7:22

Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?

John 8:12

Then Jesus spoke again unto them, 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

Ye are of your father the devil, and the desires of your father ye desire to do. He was a murderer from the beginning and abode not in the truth because there is no truth in him. When he speaks a lie, he speaks of his own, for he is a liar and the father of it.

John 11:10

But he who walks in the night stumbles because there is no light in him.

John 12:46

I am come as a light into the world that whosoever believes in me should not abide in darkness.

2 Corinthians 6:14-16

Be ye not unequally yoked together with unbelievers, for what fellowship does righteousness have with unrighteousness? and what communion does light have with darkness?

1 Timothy 4:2

that in hypocrisy shall speak lies; having their conscience seared as with a hot iron;

James 2:14

My brethren, What shall it profit though someone says that they have faith and do not have works? Shall this type of faith be able to save them?

James 2:16

and one of you says unto them, Depart in peace; be ye warmed and filled; but ye do not give them those things which are needful for the body; what shall it profit them?

James 2:18

But someone may say, Thou hast faith, and I have works; show me thy faith without thy works, and I will show thee my faith by my works.

1 John 1:3

that which we have seen and heard we declare unto you, that ye also may have communion with us; and truly our communion is with the Father and with his Son Jesus Christ.

1 John 1:8

If we say that we have no sin, we deceive ourselves, and there is no truth in us.

1 John 2:9-11

He that says he is in the light and hates his brother is still in darkness.

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:

Do not

Bible References

If

1 John 1:8
If we say that we have no sin, we deceive ourselves, and there is no truth in us.
1 John 2:4
He that says, I have known him, and does not keep his commandments, is a liar, and the truth is not in him.
1 John 4:20
If anyone says, I love God and hates his brother, he is a liar; for he that does not love 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 thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
James 2:14
My brethren, What shall it profit though someone says that they have faith and do not have works? Shall this type of faith be able to save them?
Revelation 3:17
Because thou sayest, I am rich and increased with goods and have need of nothing and knowest not that thou art wretched and miserable and poor and blind and naked,

Fellowship

1 John 1:3
that which we have seen and heard we declare unto you, that ye also may have communion with us; and truly our communion is with the Father and with his Son Jesus Christ.
Psalm 5:4
For thou art not a God that loves wickedness; neither shall one who is evil dwell with thee.
Psalm 94:20
Shall the throne of iniquity have fellowship with thee, who creates toil under the guise of law?
2 Corinthians 6:14
Be ye not unequally yoked together with unbelievers, for what fellowship does righteousness have with unrighteousness? and what communion does light have 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 anyone says, I love God and hates his brother, he is a liar; for he that does not love his brother whom he has seen, how can he love God whom he has not seen?
John 8:44
Ye are of your father the devil, and the desires of your father ye desire to do. He was a murderer from the beginning and abode not in the truth because there is no truth in him. When he speaks a lie, he speaks of his own, for he is a liar and the father of it.
1 Timothy 4:2
that in hypocrisy shall speak lies; having their conscience seared as with a hot iron;

Do not

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