Jealousy in romance is like salt in food. A little can enhance the savor, but too much can spoil the pleasure and, under certain circumstances, can be life-threatening.
Although we are all the same in not wanting problems and wanting a peaceful life, we tend to create a lot of problems for ourselves. Encountering those problems, anger develops and overwhelms our mind, which leads to violence. A good way to counter this and to work for a more peaceful world is to develop concern for others. Then our anger, jealousy and other destructive emotions will naturally weaken and diminish.
An affectionate disposition not only makes the mind more peaceful
and calm, but it affects our body in a positive way too. On the
other hand, hatred, jealousy and fear upset our peace of mind, make
us agitated and affect our body adversely. Even our body needs peace
of mind and is not suited to agitation. This shows that an
appreciation for peace of mind is in our blood.