Problem of mindless thinking

Thinking, for most people, is involuntary and compulsive, even addictive. Many people are tortured on a daily basis by their minds, by the voice in their head that never stops speaking. Most negative emotional states are caused by dysfunctional thinking, and emotions are the reaction of your body to your thoughts. For example, grievances, resentment, guilt etc. disappear when the voice in your head stops telling its old stories. Fear disappears when your mind no longer creates future scenarios – to which your body reacts as if they were a present reality.

Eckhart Tolle