Excerpt from The Four Agreements by Don Miguel Ruiz:
What you are seeing and hearing right now is nothing but a dream. You are dreaming right now in this moment. You are dreaming with the brain awake.
Dreaming is the main function of the mind, and the mind dreams twenty-four hours a day. It dreams when the brain is awake, and it also dreams when the brain is asleep. The difference is that when the brain is awake, there is a material frame that makes us perceive things in a linear way. When we go to sleep we do not have the frame, and the dream has the tendency to change constantly.
Humans are dreaming all the time. Before we were born the humans before us created a big outside dream that we will call society's dream or the dream of the planet. The dream of the planet is the collective dream of billions of smaller, personal dreams, which together create a dream of a family, a dream of a community, a dream of a city, a dream of a country, and finally a dream of the whole humanity.