At the very end, without memory we are nothing. The things you say; the way you feel; the way you act in certain situations... it's because you have a memory of something. Imagine we are building the biggest, most solid room that we could ever have. And sometimes you need to work on it, because thoughts turn into memories. Sometimes they will start to create dreams and realities, and what actually happened changes inside yourself during the years. I think that's how to preserve reality; we change it so it stays alive. The thoughts may change, but the feeling remains.