I just finished reading this book, and may have to read it again.  Here are a couple of excerpts: 

Lucid living is being conscious that you have two aspects to your identity right now.  Your apparent nature is the person you appear to be, but your essential nature is awareness which is witnessing all you experience.  Right now, just as when you are dreaming, you are awareness appearing to be a person. 

Although we appear to be separate individuals within  the life-dream, there is only one awareness dreaming the life-dream.  Your essential nature is the same as everyone else's essential nature.  We appear to be many, but essentially we are one. 

Wow!!