Forbes: The definition of self-confidence might seem obvious, but Mark D. White, Ph.D., described it powerfully in Psychology Today: “ The best kind of confidence is like a classical virtue: it strikes a ‘golden mean’ between self-doubt and arrogance, allowing a person to embody his or her positive traits without bragging about them.”

http://www.forbes.com/sites/williamarruda/2016/04/12/15-ways-to-increase-your-confidence-today/#179e68842fe8