You need to know things the others don't know. It's what no one knows about you that allows you to know yourself.
Don DeLilloWe feel certain that the extraterrestrial message is a mathematical code of some kind. Probably a number code. Mathematics is the one language we might conceivably have in common with other forms of intelligent life in the universe. As I understand it, there is no reality more independent of our perception and more true to itself than mathematical reality.
Don DeLillo