Time

Everything is happening in an eternal present moment. In this infinite amount of time there exists infinite spaces, dimensions, or possible realities to experience. 

Real life consists of bluffing, of little tactics of deception, of asking yourself what is the other man going to think I mean to do. 

Real life is based on making the best decisions you can with incomplete information that can never be complete. You never know someone else's mind. 

Real life is not just about modeling the mathematically optimal decisions. It's about discerning the hidden, the uniquely human. It's about realizing that no amount of formal modeling will ever be able to capture the vagaries and surprises of human nature.