What causes this kind of damage? Glucocorticoids that are caused by stress.
What that means is do not spend time with jerks and a stressful crowd. That is to say they hurt not just your subjective feelings, but also your biology and that causes damage to your hippocampus and that over time will causes different types of mental problems.
It is part of the rule not to do things which damage your physical health.
There is no obligation to go to any kind of religious gathering that is filled with jerks.