Peath wrote: I have a friend who consistently complains about his life situation and other people. He is somewhat interested in Zen and has an appreciation of spiritual texts.
I know that Tolle's teachings will help him and suggested The Power Of Now audiobook. He downloaded it, started listening to it, and says he thinks Tolle is 'phoney' and said that he's 'cynical about anything that generates profit, and anyone who appears on Oprah.'
Below are pure speculations
Sometimes it's very important who is giving an advice. If your friend considers you as someone wiser than him then it's more possible that he will honestly give it a try. If on the other hand he doesn't accept you in this position, then he will use ET materials to find flaws and to prove your advice was of a poor quality. Sad, but sometimes true...