It is tough to understand things when you are part of intersection of your world and the universe.
Contrary to popular beliefs, to understand a system, can you be a part of it? Can you be sure that you have encompassed all the variables that constitute the state of the system?
Can you even be sure that you can understand the system by being part of it? By the time you have understood the system, you being part of it, your understanding might have had changed the system altogether.
Now, if you are not part of the system, how can you be sure that you have knowledge of all the possibilities within the system? Can you be sure that what you are observing from outside the system, is a cause? Or is it an effect that the system wants to project as the cause?