If you tell a lie big enough and keep repeating it, people will eventually come to believe it. The lie can be maintained only for such time as the State can shield the people from the political, economic and/or military consequences of the lie. It thus becomes vitally important for the State to use all of its powers to repress dissent, for the truth is the mortal enemy of the lie, and thus by extension, the truth is the greatest enemy of the State. Adolph Hitler, Mein Kampf

The pathological liar is a covert narcissist, an addict, a psychopath, a sociopath, a gaslighter, or you could say a spin doctor. No matter what you attribute it to, if you are listening to someone who is trying to make you believe something, that you know in your heart to be untrue, this person has prepared their case very well. You may love them, you may have given birth to them, they may be your parent or grandparent, nonetheless, you must trust your soul. Learn from this and grow.