Impossible
“If you know something is impossible to be happened, will you move on and get along, or will you bet and wait / have faith?”
“Depends on what makes it impossible. People confuse impractical with impossible, so we need to rule out impracticals. Then we need to rule out what we don't accept. Like, landing on moon tomorrow for me is impractical. Becoming a girl for me is possible, but I won't accept it, so it is out, too. Then there are things which are not in our hands so we assume them impossible. Then comes things which we can do with perseverance if we keep going, but we believe them to be impossible, just like how you said that you can't be a pro photographer. :P”