How The Melancholic Temperament 
 
  Relates to
  the
 
  Heresy of
Decisional Regeneration

Long before the Empirical Movement of the Enlightenment... Long before the Chimera of Psychology...there were the humor theory which evolved into the temperament theory. By the Civil War, the humor theory (and bloodletting) was thoroughly discredited, being replaced in the nineteenth century by phrenology.
One of the four temperments was melancholic.