When you wake up, what do you do? (Hold on, I actually have point here)
Well, let's say you sleep with pyjamas, shall we? Well, so you take off the pyjama, and dress yourself with everyday clothes.
Now let me ask you - when you dress yourself, do you even think about it? I guess the answer is no... But think, you weren't born with the ability to dress yourself. Somewhere along your life, probably as a baby, you put some serious thought as to how to dress yourself. Over time, as the years passed by, you got so good at dressing yourself, that it became quite a natural thing to do. You don't even think about it, you just take of your shirt, pants, etc. without having to concentrate or even consciously think about it.
When we do things as naturally as dressing ourselves, that means we've become professionals.
So, when the day comes, you'll be able to just hold a deck of cards in your hand, and just think about doing a pass, and your hands will already do it for you. On that day, you'll know you are a professional.
That makes no sense at all. If I can write/type without thinking about it, does that mean I'm a professional writer/typer? If I can walk without thinking about it, does that mean I'm a professional walker? Or more extreme, if I can throw a football without thinking about it, does that mean I'm a professional football player? Sorry, but what you said just doesn't make any sense.