“Logic will get you from A to Z; imagination will get you everywhere.” ― Albert Einstein

A great quote if you think 

"I have a big dream, an it's infinity, and nobody can stop me from dreaming"

But if you turn it around,

"You can dream as much as you want, but in reality, the facts are only from A to Z, and you cannot change it whether you like it or not"

The quotes are only a line, but so many different ways to interpret depending on the mood you're  in.