It doesn't just mean there is only one ideal dream life to be living. For some people, to create a dream life is to be working at a job that they love, or being able to enter a flow state of mind while working. For others, it's being in good physical health, having a loving family, a strong network of friends.

There are 3 elements of your dream life: being, having, and doing. I was first introduced to this concept in the classic book The 4-Hour Workweek, which describes a Dreamline worksheet. The concept is simple.