In the world of form, everything changes and evolves. So, there was a certain evolution of the teaching. Different pointers came in, different stories, different approaches to the truth, which always is the same.
Eckhart TolleFear seems to have many causes. Fear of loss, fear of failure, fear of being hurt, and so on, but ultimately all fear is the ego's fear of death, of annihilation. To the ego, death is always just around the corner. In this mind-identified state, fear of death affects every aspect of your life.
Eckhart Tolle