Son of Man refers to the original man, or Anthropos, that first appeared in early Near Eastern myth… a synonym for Son of Man according to the archetypal interpretation might be ‘primal Man’ — Man spelled with a capital M.
Edinger catalogues four distinct hermeneutic categories for ‘Son of Man’ — personalistic, archetypal-Anthropos, messianic, and eschatological — arguing that the figure’s symbolic polyvalence is the signature of a genuinely living symbol.
, Transformation of the God-Image: An Elucidation of Jung’s Answer to Job, 1992thesis