Ye are of your father the devil, and the eager desires of your father will ye do. He was slaying men from the beginning, and stood not in the truth, for there is no truth in him. When he would speak a lie, he speaks of his own things; for he is a liar, and the father of him.

And ye have not known him; but I know him: and if I say, I know him not, I shall be a liar like you: but I know him, and keep his word.

It may not be: and let God be true, and every man a liar; as has been written, That thou mightest be justified in thy words, and mightest conquer in thy being judged.

(And so having ascended, what is it except that he also descended first into the lower parts of the earth?

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

He saying, I have known him, and not keeping his commands, is a liar, and in him is not the truth.

Who is a liar if not he denying that Jesus is the Christ? He is antichrist, denying the Father and the Son.

If any say, I love God, and hate his brother, he is a liar: for he not loving his brother whom he has seen, God whom he has not seen, how can he love?

He believing in the Son of God has the testimony in himself: he not believing God has made him a liar; for he has not believed the testimony which God has testified of his Son.