The terms Pathological Liar, Habitual Liar, Chronic Liar or a Sociopathic Liar, are often used to refer to a Compulsive Liar. But there are some differences.
First of all, everyone lies from time to time, but for a compulsive liar, telling lies is routine. A compulsive liar will resort to telling lies regardless of the situation - it becomes a habit, a way of life, a second nature if you will. Lying is their normal and reflexive way of responding to questions. Compulsive liars bend the truth about everything, large and small. For a compulsive liar, telling the truth is very awkward and uncomfortable, while lying feels right. Compulsive lying is usually thought to develop in early childhood, due to being placed in an environment where lying was necessary. For the most part, compulsive liars are not overly manipulative and cunning, rather they simply lie out of habit, an automatic response, which is hard to break and one that takes a toll on a relationship.
A sociopath, for instance, is typically defined as someone who lies incessantly to get their way and does so with little concern for others. A sociopath is often goal-oriented. Sociopaths have little regard or respect for the rights and feelings of others. Sociopaths are often charming and charismatic, but they use their talented social skills in manipulative and self-centered ways. Sociopaths cannot be changed!
WHAT THE BIBLE SAYS ABOUT BEING A LIAR
When someone is a compulsive liar he or she exhibits the character of the devil, who always hated the truth, because there is no truth in him. When he lies, it is consistent with his character; for he is a liar and the father of lies! (See John 8:44)
It also says that it is no surprise that the devil, a.k.a. Satan, disguises himself as an angel of light and that it is no wonder that his servants also disguise themselves as servants of righteousness. (See 2. Corinthians 11:14-15)
Compulsive liars deceive others and will themselves be deceived! (See 2. Timothy 3:13)
If you have the lifestyle of a compulsive liar, whether you call yourself a Christian or not, unless you repent your fate will be in the fiery lake of burning sulfur. (See Revelation 21:8)
That’s why the Scriptures say that,
“Since you have heard about Jesus and have learned the truth that comes from Him, throw off your old sinful nature and your former way of life, which is corrupted by lust and deception. Instead, let the Spirit renew your thoughts and attitudes. Put on your new nature, created to be like God—truly righteous and holy.
So stop telling lies. Let us tell our neighbors the truth, for we are all parts of the same body!” Ephesians 4:21-25 NLT