An interesting story of when Eckhart Tolle met Ramesh Balsekar, an Advaita (non-duality) proponent who was a student of Nisargadatta. The author suggests Advaita and Tolle’s Dwaita (duality) are 2 possible paths to the same place. While this is true, I would suggest Tolle’s teachings are more popular because more people can relate them to their own experience.
Advaita on the other hand is much more useful after awakening when one can begin to appreciate what it really means. Before that, any concept of Advaita is meaningless as it is beyond any concept the mind can muster. Everything we experience is one thing and we are That?? I’ve even seen awake teachers confuse the inner unity of Self realization with the much vaster unity that Advaita describes, butchering it.
The story is otherwise very good.
[link updated Feb 2016]