“Persons who have a strong sense of efficacy deploy their attention and effort to the demands of the situation and are spurred by obstacles to greater effort.” Albert Bandura Self-efficacy mechanism in human agency [Albert Bandura, 1982, Self-efficacy mechanism in human agency, American Psychologist, 37, 2, 122-147, 10.1037/0003-066X.37.2.122, 0003-066X] (p. 123) (appears also in Bandura's Social Foundations of Thought and Action, 1986, p. 394)
“If self-efficacy is lacking, people tend to behave ineffectually, even though they know what to do.” Albert Bandura Self-efficacy mechanism in human agency [Albert Bandura, 1982, Self-efficacy mechanism in human agency, American Psychologist, 37, 2, 122-147, 10.1037/0003-066X.37.2.122, 0003-066X] (p. 127)