Competence / Incompetence

There are 4 possible levels professional aptitude/know-how which could be used to categorize anyone working in an organization. They are as follows:
Unconscious Incompetence - I know not that I know not
Conscious Incompetence - I know that I know not
Conscious Competence - I know that I know
Unconscious Competence - I know not that I know
It is not necessary that a particular individual has to go through all the above phases. However, it is desirable for a competent manager to try and attain the level of Conscious Competence. I was told that Unconscious Competence is probably the hardest to achieve. The problem is that if one is aware of one's capabilities then complacency sets in which restricts one from achieving the highest level of competence.