"It is my simple thesis that a human problem requires a human solution. First, we have to learn to recognize a human problem when we see one; and, second, upon recognizing it, we have to learn to deal with it as such and not as if it were something else. Too often at the verbal level we talk glibly about the importance of human factor; and too seldom at the concrete level of behavior do we recognize a human problem for what it is and deal with it as such."
Frederick J Roethlisberger, 1969