Many people had bad and hard time due to the stress they face such as the death of a friend.
Of course it varies from one person to another due to the difference between people and their capability of facing life.
Human personality can suddenly turn from happiness to sadness or fear (from good mood to bad mood), but it is hard to be the opposite.
We have to control our feelings and emotions in a way which keeps us far from those people that affect our feeling, and to take the problems in easy ways, and to make ourselves busy in other things.
Besides, We have to relax to overcome our anger and to restore our normal life.
Feras Taleb
E&T by Maher Taki