|Pessimists are the individuals who have acquired an Inferiority complex as a result of the experiences and impressions of their childhood, for whom all manner of difficulties have vouchsafed the feeling that life is not easy. They always look for the dark side of life as a result of their pessimistic personal philosophy, which has been nourished by false treatment in their childhood. If they are children, they persistency call to their mothers, or cry for them as soon as separated. This cry for their mothers can sometimes be heard even in their old age.
– Alfred Adler (1870-1937)