So, I know hormones in the brain being released are more or less responsible for the emotions we feel. From a physical point of view, the amount of hormones available and the production rate of the hormones is limited. So, if the amount of hormones being released exceeds the production rate, from a purely physical point of view, at some point it will be depleted. I personally experience this in the form that after euphoria I feel more down than usual (at least I believe that this is an example).
(Also, there is physical pain. I have no idea if that can be limited in any way depending (or not) on time of duration and intensity.)
So, I can grasp the concept from a logical point of view. On the other hand, I have a strong sense that there are certain actions in the world that have no upper limit of inflicting physical and psychological pain.
Question: Is the length and intensity of feelings and emotions limited, especially these of physical and psychological pain?