Marie Kondo fully believes that the way your home is organized, or not, has a direct reflection on how you feel in general and the energy that you are choosing to surround yourself with. She also believes that when you are in chaos or are depressed, it shows in how you are keeping your house up...or not.
Kondo stresses that when you imagine your dream home, you are picturing peacefullness and a good place to be. In pricturiing the dream, she believes that all can achieve organization, tidiness and peace, one picture at a time. If you picture it done, you are actually one step towards making it happen, she feels.
Marie Kondo probably has in mind how stressful it is when you cannot find something or when you spend ages tidying up all the time. A dream home would be organised and there's less reason to bicker about who's doing what. When everything is organized, life is easier and costs less and a dream home is surely one without mess. Kondo believes that un-sorted belongings can take away from our lives.