This is a convenient discussion. Recently, I have been trying to explain this to many people for the last three months, but most of these people do not seem to have patience and tolerance to research this answer properly. So, I can answer this question, but I ask that the persons who want an answer to do the research (or at least show an attempt) because without it, it is a very difficult thing to explain.
The answer speaks of: What was the first lie, Who is the devil, Who are children of the devil, and why Jesus always seemed to speak as if the Books of the Law and Prophets were foreign to Him.
What is the First Lie in Scripture? Hint it is in Genesis 3.