I see no reason this question should be directed at just christains, there are many people that can answer this question. rov. 12:22 - "lying lips are an abomination to the Lord" Eph. 4:25 - "laying aside falsehood, speak truth, each one of you" Col. 3:9 - "do not lie to one another...you have laid aside old self" I Jn. 2:22 -"Who is the liar...the one who denies Jesus is the Christ" God cannot lie. Contrary to His character of Truth. Numb. 23:19 - "God is not a man, that he should lie" Heb. 6:18 - "it is impossible for God to lie" Titus 1:2 - "God, who cannot lie" Jn. 8:32,36 - "the truth shall set you free...the Son..." Jn. 14:6 - "I am the way, the truth, and the life" I Jn. 2:27 - "is true, and is not lie" Ps. 58:3 - "those who speak lies go astray from birth" Rom. 1:25 - "they exchanged the truth of God for the lie" The Penalty: The punishment to be meted out to liars is of the severest kind. They are positively and absolutely excluded from heaven (Rev 21:27; 22:15), and those who are guilty of this sin are cast into the lake of fire (Rev 21:8). We are reminded of the awful fate meted out to Ananias and Sapphira when they lied to God and man (Acts 5:1-11). God will "destroy them that speak lies" (Ps 5:6), and "he that uttereth lies shall not escape" (Prov 19:5), yea "a sword is upon the liars" (Jer 50:36 the King James Version). The liar is thereby debarred from rendering any true and acceptable worship unto the Lord (Ps 24:4). The Scriptures abound with illustrations of lying and the results and penalties therefor. A careful study of these illustrations will reveal the subtlety of falsehood. Sometimes a lie is a half-truth, as set forth in the story of Satan's temptation of Eve (Gen 3). Cain's lie (Gen 4:9) was of the nature of an evasive answer to a direct question. Jacob's deception of his father, in order that he might inherit the blessing of the firstborn, was a barefaced and deliberate lie (Gen 27:19). The answer which Joseph's brethren gave to their father when he asked them concerning the welfare of their brother Joseph is an illustration, as well as a revelation, of the depth of the wickedness of hearts that deliberately set themselves to falsify and deceive (Gen 37:31,32). Even good men are sometimes overtaken in a lie, which, of course, is no more excusable in them than in the wicked; indeed, it is more shameful because the righteous are professed followers of the truth (David in 1 Sam 21:2). What more striking example of the heinousness of lying in the sight of God can we have than the fate which befell Gehazi who, in order to satisfy a covetous desire for possessions, misrepresented his master Elisha to Naaman the Syrian whom the prophet had healed of his leprosy: "The leprosy therefore of Naaman shall cleave unto thee, and unto thy seed for ever. And he went out from his presence a leper as white as snow" (2 Ki 5:22-27)? The story of Peter's denial of his Lord, and his persistent asseverations that he did not know Him and was not one of His followers, makes us shudder to think that it is possible for a follower of Christ so far to forget himself as not only to lie, but buttress lying with swearing (Mt 26:72).