In the Foundation's Topics
If someone constantly harbors thoughts rooted in fear, ignorance, and other mental limitations, their inner harmony will consequently deteriorate, their vital energy will be consumed by mental conflicts, and they will likely experience profound anguish, suffering, and even depression.
However, if a person becomes careless and lets their vital energy drop, the limitations and traumatic programs are activated again, and they may fall into depression.
On the contrary, expressing bitterness, sadness, frustration, or apathy releases other chemicals within us that increase depression and reduce energy.