invisible string theory There's a theory that says the world keeps people apart until the timing is right. They may be in the same place at the same time, even share the same acquaintances and friends, but if it isn't their time yet, they will never truly meet. And when they finally do, they'll realize there were countless moments when their paths could have crossed, but never did. Only when the timing aligns perfectly will their paths converge-this is the essence of the invisible string theory.