The essence of spirituality is the search to know our true selves, to discover the real nature of consciousness. This quest has been the foundation of all the great spiritual teachings, and the goal of all the great mystics.
Throughout the history of humanity it has been said that the self we know -- the individual ego -- is a very limited form of identity. Ignorant of our true selves we derive a false sense of identity from what we have, or what we do -- from our possessions, our role in the world, how others see us, etc. Because the world on which it is based is continually changing, this derived sense of identity is always under threat, and our attempts to maintain it are responsible for much of our "self-centered" behaviour .