The Triangle points the Three Forces or Impulses, which enter at each Interval. At the 7-1-4 Triangle objects lay (substanctifs). At the 2-8-5 Triangle actions are performed (verbs). In this application too, implicit, there are Three Octaves.
From "The Enneagram - Symbolof All and Everything" by Nathan Bernier
Updated: Aug 2004 Sponsored by Gilgamesh Publishing