It is the state of credulity that a person can present, taking hold in the belief that all people, or most of them, act with a benevolent purpose and without the intention of harming third parties. These individuals are easy prey for those who cheat and plan, above all, to make a profit from it. Despite this, they are seen as subjects who are interested in helping others, either because they deserve it or need it; Upbringing and the values ​​that are instilled in an infant influence her future behavior, trust in others being one of the most common traits, which can grow over time and make this someone gullible.

However, it can refer to the feeling of joy, which sees its origin in that situation marked by the arrival of an object or being, which could generate a state of considerable happiness in those who experience it.

Although, it is also the quality that defines a being that adds, to real life situations, some fictitious details, which can feed a certain desire or belief. Beyond this, the illusions are the incorrect appreciations about some thing or circumstance; all people are open to experiencing this, but it can become something pathological, not being a single symptom, but forming part of a series of conflicts that lead to the diagnosis of psychological illnesses. Psychosis is one of the most common references to highlight hallucinations as a probable symptom of a specific psychological condition.