The article you linked gives you an experiment. Did you try it?
Still don’t believe it? Prove me wrong. Monitor yourself for a time and document one case of suffering that is not accompanied by thought. In fact thought comes first, and then there is suffering. This is the way it always happens.
I recommended this to a young man who recently realized he had a drug problem. The idea is not to predict where your thoughts are going, but just journal. What bothers you, little things, seemingly insignificant. Positive stuff too. The other day I just enjoyed watching a child take pleasure in walking, measuring each step, imagining who knows what. That led to other pleasant thoughts.
Tolle seems like a bad version of mindfulness. It's like, duh, thoughts lead to thoughts, friggin genius. Then he said, oh, I'm suffering, so thoughts caused that. Brilliant. Mindfulness is about calming those thoughts, but not viewing them as "bad", they just are. Google "mindfulness" and see if you get some nice feelings reading about it.
I remember a quote saying "you aren't your thoughts". Is that close?