Realm of the Three

From Cassiopedia

This is best explained with the following quote from the Cassiopaea transcripts:

A: Laura, my dear, if you really want to reveal "many

  beautiful and amazing things," all you need to do is
  remember the triad, the trilogy, the trinity, and look
  always for the triplicative connecting clue profile.
  Connect the threes... do not rest until you have found
  three beautifully balancing meanings!!

Q: So, in everything there are three aspects?

A: And why? Because it is the realm of the three that you

  occupy.  In order to possess the keys to the next level,
  just master the Third Man Theme, then move on with grace
  and anticipation.

This seems to say that things occur naturally in threes, due to a fundamental feature of this world and of the archetypal world of which this world is a reflection. This could be a reference to the 4th Way Law of Three, which states that any phenomenon at any scale is always a confluence of three distinct forces. Mastering the third man theme may refer to the work needed for overcoming what Mouravieff calls man's 'third force blindness,' i.e. tendency to think in either/or or black and white and to miss a deeper level reconciling these.

See Law of Three, Realm