In psychology, maturity can be operationally defined as the level of psychological functioning one can attain, after which the level of psychological functioning no longer increases much with age. However, beyond this, integration is also an aspect of maturation, such as the integration of personality, where the behavioral patterns, motives and other traits of a person are gradually brought together, to work together effectively with little to no conflict between them, as an organized whole, e.g., bringing a person's various motives together into a purpose in life. Case in point: adult development and maturity theories include the purpose in life concept, in which maturity emphasizes a clear comprehension of life's purpose, directedness, and intentionality, which contributes to the feeling that life is meaningful.