" Any lack of balance in this respect, either too far below or too far above the mark, has an irritating effect upon the surroundings. To know if one has an inflation, a person has only to see if he or she gets on other people's nerves. If so, one is probably a bit overestimating one-self, or underestimating oneself for with an inflation a person may have feelings of either superiority or inferiority. Feelings of inferiority are just a veiled inflation. If one feels inferior, that's really ambition; a person wants to be more than one is. One wants to be a great person and knows one isn't. Inferiority is also inflation and, therefore, gets on people's nerves.
Sometimes people come in and say, "Oh well, you know, I can't do it. How do you think I can do this? You know, I'm not capable, I'm so stupid, I can't think," and so on. Then I say, "Now stop that nonsense. Get on with your job." They are really making a conceited dance out of calling themselves inferior and incapable. (p. 73) "
― Marie-Louise von Franz , The Way of the Dream (Shambhala Pocket Classics)