No, it's not really like saying that all books come from the dictionary.
I understand what you're trying to get at, but I think you're missing my point. What I meant was that it's all just the brain chattering away to itself. And without a brain, there are no thoughts. But there was language before there were dictionaries, so your analogy doesn't really fit.
Although, of course, there are different parts of the brain that have different functions. For example, a person with a defective amygdala won't be abe to regulate their emotions properly. Even if they fully understand and believe everything Eckhart Tolle says.
With Eckhart Tolle's own breakdown, it seems it was an overloaded amygdala that caused his state of dispair. Now, we can speculate as to whether it was the dispair that overloaded his amygdala or the overloaded amygdala that caused the dispair, but we probably can't know for sure.
As Todd Murphy says in this video, it seems that at the moment Tolle's brain went silent of all thoughts, this would have been his right hippocampus being fully activated. Yet the fear was still there, so the amygdala was still active at that point. When he disappeared into the void, this was his right amygdala shutting down and his left amygdala being activated.
