The difference between a good observer and one who is not good is that the former is quick to take a hint from the facts, from his early efforts to develop skill in handling them, and quick to acknowledge the need to revise or alter the conceptual framework of his thinking, The other — the poor observer — continues dogmatically onward with his original thesis, lost in a maze of correlations, long after the facts have shrieked in protest against the interpretation put upon them.

p. 116; Cited in Supervisory Management, (1963), Vol. 8, p. 58 - The Social Problems of an Industrial Civilisation, 1945