"If, as psychologists, we follow the analogy of the other biological sciences, we must expect to find normalcy synonymous with maximal efficiency of function. Survival of the fittest means survival of those members of a species whose organisms most successfully resist the encroachments of environmental antagonists, and continue to function with the greatest internal harmony. In the field of emotions, then, why would we alter this expectation? Why should we seek the spectacularly disharmonious emotions, the feelings that reveal a crushing of ourselves by environment, and consider these affective responses as our normal emotions?"