Since self-knowledge is a matter of getting to know the individual facts, theories are of very little help. For the more a theory lays claim to universal validity, the less capable it is of doing justice to the individual facts. Any theory based on experience is necessarily statistical; it formulates an ideal average which abolishes all exceptions at either end of the scale and replaces them by an abstract mean. This mean is quite valid, though it need not necessarily occur in reality. Despite this it figures in the theory as an unassailable fundamental fact. The exceptions at either extreme, though equally factual, do not appear in the final result at all, since they cancel each other out.
- Pg. 5, The Undiscovered Self – C.G. Jung, 9-780691-150512