How can you make a compulsive liar face his lies and realize they are lies?
Perhaps the best one can do is face up to the lies you are being told .. admit to yourself they are lies and move on .. We really cannot force anyone to do anything and if forcing begins to look like an option, then maybe it’s time to acknowledge there is a problem we need help with. Let the liar be inspired (or not) by our own actions. Get help. You deserve it.