It is not sensible to be perturbed, to suffer psychologically, because it has a detrimental affect on physical life and is in fact imaginary.
It means that self-pity, sorrow, desire, fear, regret, hope, pleasure are all connected with being hypnotized by non-functional thought. Non-functional thought makes up a multitude of illusory superproducts, like time (past and future).
This false perception can be called the fragmentary perception of thought.
It is the most important thing to free oneself from living in the prison of this perception.