Scary truth

What's scarier? Someone you don't understand, someone you too understand or someone you never know at all? Have you ever ask yourself this? Well personally I think someone you understand too much is the scariest. It's like you literally read their mind, know what they are thinking and know what they wanna do next. Isn't this kind of people the scariest? At least people you don't know will never harm you in one way or another. You are just another passer by in their life. Well, life is such a scary thing. Sometimes I wish I'm not alive.