I was surprised to find what is essentially a piece of crap in the Shambhalla Sun.
Here is the Shambhalla Sun review of Tulku
TULKU: Divine Birth, Ordinary Life is the new documentary by Gesar Mukpo (son of the late Chögyam Trungpa Rinpoche) that is his intensely personal exploration of life as a tulku, or reincarnated Buddhist master.
First - Gesar is the reincarnation of a Buddhist master but he is himself not a Buddhist master (there are only two tulkus in the film who are Buddhist masters and it's none of the western boys). This needs to be recognized clearly otherwise we are deceived by the language.
He and the 4 have never quite resolved who they are, what they’re doing on Earth, or what they should commit to.
But really, who has? Who knows why we’re here, in this body/shape, and what we’re moving toward?
Total nonsense. A tulku should at the minimum work as hard as possible to be a good person. Then if possible, they should minimize harm toward other beings and help other beings as much as possible. Then if possible they should at least internally be the best bodhisattvas possible and they as they acquire the means they should expand this bodhisattva activity as much as possible and eliminate as much suffering as possible. If possible they should become good examples. Then they should become very good practitioners and possibly become very good, perhaps even great teachers and yogis. They should support Buddhist masters and if possible themselves become Buddhist masters in this lifetime.
A tulku is not existential; it is a function, a realization of bodhisattva activity. It is not robes, a throne, a status or anything outward. It is the activity of removing suffering in samsara and sustaining the exceptional example of Shakyamuni or Padmasambhava as much as possible.