Originally Posted by
Winter Blossom
That, and that they needed to listen to themselves (their own voices in their head). I believe that's what Arnold was trying to explain to Dolores - in order for her to pass the maze and fully understand it (achieve consciousness), she needed to follow her own thoughts and ideas. It wasn't about what he thought. It was about her thought process, and her figuring that out on her own (through time).
If she only ever listened to and followed Arnold's wishes/demands, she didn't move forward. She had to be a free thinker and take Arnold out of it, which is why we see her talking to her herself at the end. She realized she was following her own inner voice; her own inner wants and desires. She led herself back there, cause subconsciously she wanted it - not Arnold wanting it from her.