Frustration is a feeling that occurs when a person blocks from getting the desired results. In general, we feel happy every time we reach one of our goals, and every time we prevent from reaching our goals, we can become frustrated and angry, resentful, and angry. 

Usually, the more important goal is the more frustration and anger or loss of confidence that results. Disappointment is not necessarily bad, because it can be a useful indicator of a person's problems in life, and its consequences can act as a motivation to change.

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