If we conceive our body as a thing circumscribed to a diagram, its end is present at any point of its surface.
The emotional life hangs on this surface, since it is the outcome of the experiences we live through the outer appearance of our body.
Thus, the emotional life should be familiarized with the end more than it seems when we regret the end of a feeling.
In the case of the positive feelings, it is clear that we use the mobility of the body during the life of our feelings, but we hope to give them stability by using also its immobile and dead properties. For instance, the feeling of love is designed to be stable through marriage because it offers to the two bodies the possibility of living together in the many moments when each of them sinks into their own dead surface.
In the case of the negative feelings, the dead aspect of the body is the solution for resisting to fears, regrets, shame, and so on. That aspect is revealed especially in the sleeping time. For the sleep is not a psychological manner to forget our negative feelings (often they are not forgotten), but mainly the way by which the body invades our psychological life instilling into it the necessary knowledge of the end.