Psychology believes that the three main sources of vitality are desire, narcissism, and aggression. They are the three most primitive and authentic forces within a person. The first is desire, which is an outward pull, a sense of life's direction. It represents what you want, where you want your life to go, and reflects your longing and motivation for the future. A person without desire is often not truly transcendent, but rather frozen.

The second is narcissism. In our context, I might consider it a pejorative, but healthy narcissism in psychology is an important source of a person's self-worth and self-stability. Narcissism is an inward nourishment; it is a sense of self in life. Healthy narcissism means I believe I am worthy, I believe I am valuable, I am willing to maintain myself, and I believe I deserve good things.

The third is aggression. Aggression is the force that maintains personal boundaries. It is not about hurting others; on the contrary, it is the most direct and best manifestation of a person's vitality. Aggression includes fighting for oneself, voicing one's opinions, daring to face conflicts, daring to break through and cut off what is not suitable for oneself in a timely manner, allowing oneself to break free from repression, and daring to live out the true self. People without aggression may seem gentle and magnanimous, but in fact, they have been suppressing themselves and their inner strength. This suppressed emotion does not disappear; eventually, it will erupt in a more grotesque manner.

Vitality is the state in which these three forces flow freely within the body. When desire is suppressed, narcissism is damaged, and aggression cannot be properly released, people will become uninterested, lack a sense of direction, and dare not take action.