In psychology as in biology we cannot afford to overlook or underestimate this question of origins, although the answer usually tells us nothing about the functional meaning. For this reason biology should never forget the question of purpose, for only by answering that can we get at the meaning of a phenomenon. Even in pathology, where we are concerned with lesions which have no meaning in themselves, the exclusively causal approach proves to be inadequate, since there are a number of pathological phenomena which only give up their meaning when we inquire into their purpose. And where we are concerned with the normal phenomena of life, this question of purpose takes undisputed precedence.
—C. G. Jung; The Archetypes and the Collective Unconscious (via victorioushandofgod)