People who underestimate their capabilities also bear costs, although, as already noted, these are more likely to take self-limiting rather than aversive forms. By failing to cultivate personal potentialities and constricting their activities, such persons cut themselves off from many rewarding experiences. Should they attempt tasks having evaluative significance, they create internal obstacles to effective performance by approaching them with unnerving self-doubts
Albert BanduraSelf-belief does not necessarily ensure success, but self-disbelief assuredly spawns failure.
Albert BanduraPeople who believe they have the power to exercise some measure of control over their lives are healthier, more effective and more successful than those who lack faith in their ability to effect changes in their lives.
Albert BanduraExcept for events that carry great weight, it is not experience per se, but how they match expectations, that governs their emotional impact
Albert Bandura