Have you ever feel like you've known someone for a really long time, like your whole life. And you think you know everything about them when really, you know nothing. You don't know who they are anymore. Don't know what changed them along the way. Maybe there's no reason, nothing, all of a sudden they're like that. Even they don't know themselves. They live a happy, perfect life to know what has happened. Maybe nothing has happened. It's just their minds playing tricks. Or maybe they just want to be troubled because their lives always go smoothly. They think too much. In the end it's only troubles they got.