Answer:
A blind man enters a maze, and the entrance closes behind him. His only way out is to solve the maze. A long time passes, and he exits the maze through the correct exit. How did he solve the maze?
What goes through a door but never goes in. And never comes out?
The more of them you take, the more you leave behind. What are they?
What binds two people yet touches only one?
Three little letters. A paradox to some. The worse that it is, the better it becomes.
What is always coming but never arrives?