1 John 1:6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
In the days of the Apostles there were those who were proclaiming their own spirituality while walking "in darkness." They were lying to themselves, and then to everyone else. Later in the 1500's, those who practiced this same kind of self-justified and self-delusional spiritual walk became known as the Antinomians. According to Webster's dictionary an Antinomian is, "One of a sect who maintain, that, under the gospel dispensation, the law is of no use or obligation; or who hold doctrines which supersede the necessity of good works and a virtuous life. This sect originated with John Agricola about the year 1538."
In short, an Antinomian is a person who has said that the doctrines of grace, liberty, and freedom in Christ make obeying the rules and applying the principles of the Bible unnecessary. Now, we all know that there were ceremonial and civil laws of the Jews that passed away when Jesus came and began the new covenant. However, it is not just these Jewish, Old Testament laws that the Antinomians try to declare obsolete. The Antinomian mindset of today is one of moral relativism and permissiveness. Today's Antinomian hesitates to call sin for what it is, or to define sin in any concrete way. The present day Antinomian mantra seems to be, "I'm free in Christ. I can do what I want to do. Don't talk to me about application of the laws and principles of Scripture."
Now, most of those who espouse this distorted view of Scripture do so to suit their own purpose. In short, they lie to themselves in order to feel good about ignoring or excusing the commands and application of the principles of Scripture systematically to their lives. For these confused saints things like doctrine and systematic theology are a thing of the ancient past to be held in contempt and despised. Love and liberty become the answer for every question, and the Bible becomes a book of cliches to take from context and upon which to hang arguments for their actions. These saints become, in effect, their own lawyers; using bits and pieces of the Bible to make a case against what God requires of them. They lie to themselves.
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.