Whatever else you do in the world—your job, your hobbies, anything you accomplish—those are all wonderful things, but they represent the lesser journey. The most important journey you will ever make is the one inside yourself, and this is at the heart of the shamanic path. It is the journey of finding your own truth.
The shaman in this story understood that each generation had to find its own truth, to create its own dream, and that they could not rely on the legacy of previous generations to create their dream for them. To this end, he sent them away into the desert to find a new home and to let go of the old dream so that they could create a new one.
Sometimes life serves as our shaman and sets up situations that completely destroy our old dream. Death, divorce, the loss of job are all things that require us to go out into the wilderness, taking with us very few of our possessions, and find a new dream. But our home, our truth, is always inside us, and we take that wherever we go. In every dream we create, if we stay true to ourselves and true to our own heart's desire, then we will find peace again.
In my view, everyone has their own truth within themselves. Because we are all unique, this personal truth will never be exactly the same for any two people. That's what makes it personal. Shamanism is not based on hierarchy, deference to past teachers, or following a sacred text with blind belief, but rather on finding the wisdom within yourself. When you find your own truth and wisdom within you, you will find your own personal freedom.