It's like walking around with your shoes on the wrong feet.
It's like trying to write with your left hand.
It's like trying to keep your head above water when no one ever taught you how to swim.
It's like that feeling you get in the pit of your stomach when you know you've forgotten something.
It's like when you were in school, and the teacher told you to take notes, but you thought you'd be able to remember without them, and you were wrong.
It's like the advice your mother used to give you, but you never listened to.
It's like you were always aware of the possibility, you just never accepted the thought that it could ever become a reality.