A modern German advaita master and teacher, Eckhart Tolle (1948- ) emphasizes not being caught up in thoughts of the past or the future, and instead being aware of the present moment. He discusses this subject in his book The Power of Now. His later book, A New Earth, explores the structure of the human ego and how it distracts people from their present experience of the world. He asserts that it is the feeding of the human ego that is the source of inner and outer conflict, and that only by examining the ego may spiritual aspirants begin to see beyond it and reach a sense of spiritual awakening and a new outlook on reality.