Thomas Lloyd Qualls said this quote

It's true we all build imaginary prisons for ourselves. Believe that we are trapped behind the invisible bars of the lives we have somehow carelessly constructed for ourselves, despite our youthful promises to ourselves. We see adults who are stagnant and miserable as we grow up. They graffiti the walls behind them with their mistakes and we swear secret oaths that we will heed those warnings. We’re much too clever, we know all the shortcuts and the back alleys.