Self efficacy is the belief in one’s capabilities to organize and execute the sources of action required to manage prospective situations. If efficacy beliefs always reflected only what people can do routinely they would rarely fall but they would not set aspirations beyond their immediate reach nor mount the extra effort needed to surpass their ordinary performances. People who regard themselves as highly efficacious act, think, and feel differently from those who perceive themselves as inefficacious. They produce their own future, rather than simply foretell it.
Ref: Social Foundations of Thought and Action