Those who are constantly hiding from the truth, who speak lies; conciously or, though hard to fathom, not being concious of it are following the natural state of the creature - that is of being apart from any grace exerted by God.
When Jesus was confronted by the those that were plotting against Him, they said that the only Father they have is God. Jesus inturn replied to them by saying that they were unable to hear what He had to say, that they belonged to their father the devil; they wanted to carry out their father's desire.That their father had no truth in him and that when he lies he is speaking his native language because he is a liar and the father of lies. You can read it all in context in john 8:31ff.
When a person says something that is not true, even to go as far as to say a true statement with the intention of being deceptive, that person is a liar. That is the natural state of all people.
"Whatever does not proceed from faith is sin." Romans 14:23. This is a radical indictment against mankind of all natural virtue that doesn't flow from relying on God's grace. No one can ever recornize the terrible condition of the heart by assessing it only in relation to others. It is clear from Romans 14:23 that the depravity of man is first and foremost in our relation to God, secondarily in our relation to others.
Apart from God, one is not His child. All have sinned and come short of the glory of God. There is no one good, no not one. To be a child of God, one must be born of God. "flesh give birth to flesh, but the Spirit give birth to spirit. You should not be surprised at my saying you must be born again... unless a man be born again he can not even see the kingdon of heaven."John 31-21
