Research on how to increase positive moods and capitalize on your strengths has proliferated in recent years, thanks to the positive psychology movement, and has shed light on ongoing insights into personality, mood, and cognition.
Questions of personality have vexed mankind from the dawn of personhood: can people change? How do others perceive me? What is the difference between normal and pathological behavior? One's personality is so pervasive and all-important that it presents a clinical paradox of sorts: it is hard to assess our own personality, and impossible to overlook that of others.