When a line of thinking is suddenly lost in random mental static the transition by a hypnagogic image arising as the equivalent expression of a thought. This is because thoughts are more complex and structured than they appear, they are a kind of complex action and the image that replaces them is an embodied metaphor of that action. Every thought is a push or pull or twist against a resistance, it emerged out of metaphor and returns back into it when the personage at hand weakens it grip upon it. Personages are convenient binders for thoughts enabling sequences of them to perform a useful function. The intensity of identification of these personages serves a purpose but is also excessively strong.