Let's run a little test. Touch the tip of your nose and the tip of your big toe at exactly the same time.
You should feel the nose first, and the toe second because of the way your nervous system is wired,
it takes more time for the information to travel through the nervous system from your feet than your head, but that doesn't happen. So why are they simultaneous?
Your brain edits out the gap to avoid confusion.
The nose-sensation is delayed from the conscious until the toe gets there, your consciousness is constantly behind what we can here refer to as 'real time',
in case there are things that need to be removed from the scene.
The system is constantly at work, weeding out information it deems unnecessary or harmful from the constant stream of information that would otherwise overwhelm you.
Your brain actively shelters your mind by hiding things from it, things it deems you're better off not seeing, hearing or knowing.
You must now be wondering what I'm going on about. But you remember all those times when you're all alone, and suddenly you feel there's someone watching you?