Emotions originate from desires,
So what are desires?
In Buddhist terms, it is said as:
Greed, ignorance, anger, arrogance, doubt;
Then how should we say or interpret it in psychological terms?
Have you ever encountered it? Or have you ever experienced it?

Psychology considers desire as a kind of motivation, and only "excessive" desire brings pain;
When we want something, we strive to obtain it. This is the primitive psychological motivation system of humans. For many people with depression, we need to stimulate such positive forces. This is desirable and is the direction modern positive psychologists are working towards;
But when what you want "exceeds" your ability range and you still want it, that is greed; this greed includes material things, emotions, and social support. For example, if you earn a certain amount per day, 200 but you want more; 2000 For example, I want my partner to be tall, rich, and handsome or a beautiful, wealthy woman, and they must treat me well; or in society, others should treat me well, and in fact, they already do, but it’s just not good enough; this only brings "pain" or "anxiety" to oneself.
Ignorance is interpreted as "excessive" attachment to experience, knowledge, and values, which in psychology is called paranoid personality; generally, those with ignorance need cognitive reconstruction, mainly because the original value system is too rigid. Being too rigid easily breaks. In daily life, this often manifests as interpersonal conflicts or avoidance and social alienation. Some say kings are lonely, here I add: kings enjoy loneliness, not avoid pain. If a person's attachment does not bring trouble to themselves, it is not ignorance. Such attachment is persistence, not paranoia (paranoia means one-sided insistence on being right, which is ignorance).
Anger ( chen )? This is common in our daily emotional relationships. For example: your lover should treat you well, and the standard of "well" is based on your own criteria. When one day you find the other does not treat you as expected, you will "hate" them. This is anger. Anger expresses a kind of hatred when others cannot meet one's needs; psychology sees this as a form of self-loss of control. Everyone has different value systems and will respond accordingly (either drawing people closer or pushing them away). However, when the other party does not give the feedback one expects, hatred arises, forgetting all the usual kindness.
Arrogance and doubt, that is, pride and suspicion, manifest as looking down on others and not trusting others. Arrogance comes from excessive confidence, making one unable to find their proper place or direction. Suspicion comes from excessive distrust and doubting others. In fact, it is a contradictory psychological state where one behaviorally accepts others but mentally does not. Psychologically, it is a problem of self-decision disorder, unable to express unity of knowledge and action well, and unable to express confidence properly. Using Jung's principle of synchronicity, it can also be interpreted as: when a person looks down on others internally, an external force also looks down on themselves; when you doubt others, an external force also doubts you. So the final result brings bad backlash to oneself.

It can be seen that the philosophical roots of East and West are similar, only the words differ. Letting reasonable desires appear as motivation is our healthy way of living. When excessive and beyond limits, it only brings us endless pain and sadness!