It is about the act in which a person boasts of all the achievements made in his life or professional career, to surprise, in some way, everyone who witnesses his speech. One of the reasons why this happens is because the being that carries it out needs attention to feel, in some way, happy. It is considered to have a dependency link to care, which helps you reinforce the accomplishments you have on your list. Most of the time, these individuals make the best of events, so that their act of conceit can have a touch of mysticism and the aura that they are unattainable.
It is also seen as a feeling contrary to humility, a quality that defines who possesses it, as a being who is not concerned that others have knowledge of his wisdom and achievements, or whose behavior reflects someone who is tolerant and does not despise those who may have a lower economic, social or intellectual level. And this is the main fault of those who boast, because, by glorifying themselves for the actions committed, they begin to cultivate the ego, which conditions them to continue putting into practice the act of showing off.
The receiving some praise, you can generate a state of satisfaction for those who experience; But the constant search for this can generate vainglory, then, it would be resorting to the exhibition of the achievements obtained. It is a very controversial subject in religion, because it is an attitude that can degenerate into sin; This is because vanity and arrogance are defects that are closely related to the act of boasting.