1 John 1:6

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

1 John 4:20

If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, cannot love God whom he hath 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 is come into the world, and men loved the darkness rather than the light; for their works were evil.

John 12:35

Jesus therefore said unto them, Yet a little while is the light among you. Walk while ye have the light, that darkness overtake you not: and he that walketh in the darkness knoweth not whither he goeth.

1 John 2:4

He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him;

Revelation 3:17-18

Because thou sayest, I am rich, and have gotten riches, and have need of nothing; and knowest not that thou art the wretched one and miserable and poor and blind and naked:

Psalm 5:4-6

For thou art not a God that hath pleasure in wickedness: Evil shall not sojourn with thee.

Psalm 82:5

They know not, neither do they understand; They walk to and fro in darkness: All the foundations of the earth are shaken.

Psalm 94:20

Shall the throne of wickedness have fellowship with thee, Which frameth mischief by statute?

Proverbs 2:13

Who forsake the paths of uprightness, To walk in the ways of darkness;

Proverbs 4:18-19

But the path of the righteous is as the dawning light, That shineth more and more unto the perfect day.

Matthew 7:22

Many will say to me in that day, Lord, Lord, did we not prophesy by thy name, and by thy name cast out demons, and by thy name do many mighty works?

John 8:12

Again therefore Jesus spake unto them, saying, I am the light of the world: he that followeth me shall not walk in the darkness, but shall have the light of life.

John 8:44-45

Ye are of your father the devil, and the lusts of your father it is your will to do. He was a murderer from the beginning, and standeth not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father thereof.

John 11:10

But if a man walk in the night, he stumbleth, because the light is not in him.

John 12:46

I am come a light into the world, that whosoever believeth on me may not abide in the darkness.

2 Corinthians 6:14-16

Be not unequally yoked with unbelievers: for what fellowship have righteousness and iniquity? or what communion hath light with darkness?

1 Timothy 4:2

through the hypocrisy of men that speak lies, branded in their own conscience as with a hot iron;

James 2:14

What doth it profit, my brethren, if a man say he hath faith, but have not works? can that faith save him?

James 2:16

and one of you say unto them, Go in peace, be ye warmed and filled; and yet ye give them not the things needful to the body; what doth it profit?

James 2:18

Yea, a man will say, Thou hast faith, and I have works: show me thy faith apart from thy works, and I by my works will show thee my faith.

1 John 1:3

that which we have seen and heard declare we unto you also, that ye also may have fellowship with us: yea, and our fellowship 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 the truth is not in us.

1 John 2:9-11

He that saith he is in the light and hateth his brother, is in the darkness even until 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:

Do not

Bible References

If

1 John 1:8
If we say that we have no sin, we deceive ourselves, and the truth is not in us.
1 John 2:4
He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him;
1 John 4:20
If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, cannot love God whom he hath not seen.
Matthew 7:22
Many will say to me in that day, Lord, Lord, did we not prophesy by thy name, and by thy name cast out demons, and by thy name do many mighty works?
James 2:14
What doth it profit, my brethren, if a man say he hath faith, but have not works? can that faith save him?
Revelation 3:17
Because thou sayest, I am rich, and have gotten riches, and have need of nothing; and knowest not that thou art the wretched one and miserable and poor and blind and naked:

Fellowship

1 John 1:3
that which we have seen and heard declare we unto you also, that ye also may have fellowship with us: yea, and our fellowship is with the Father, and with his Son Jesus Christ:
Psalm 5:4
For thou art not a God that hath pleasure in wickedness: Evil shall not sojourn with thee.
Psalm 94:20
Shall the throne of wickedness have fellowship with thee, Which frameth mischief by statute?
2 Corinthians 6:14
Be not unequally yoked with unbelievers: for what fellowship have righteousness and iniquity? or what communion hath 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 a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, cannot love God whom he hath not seen.
John 8:44
Ye are of your father the devil, and the lusts of your father it is your will to do. He was a murderer from the beginning, and standeth not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father thereof.
1 Timothy 4:2
through the hypocrisy of men that speak lies, branded in their own conscience as with a hot iron;

Do not

John 3:21
But he that doeth the truth cometh to the light, that his works may be made manifest, that they have been wrought in God.

American Standard Version Public Domain