The Triangle of Balance, Relax, and Structure is the first of the three Wujifa Triangles!
Each one has its own meaning... If you look back to the post I've linked to, you'll see that relax is not limp, structure is not rigid, and balance is not polarity.
Thinking a lot about the words lately, and keeping them in my attention to see what new meaning develops. A little while ago, I had a bit of an "AHA!" moment about balance.
You see... I always used to think balance was about just stacking the blocks (look at the rolfing picture). Then, all of the sudden, we were talking about weebles - you know weebles wobble but they don't fall down, like we have before so many times and how they're balanced and if finally clicked for me - blocks which are stacked up are balanced, but so is a Weeble - in a similar, but different way.
A weeble, in addition to being an undisturbed, vertical structure, with no deviation of one part being precisely stacked above the other parts, also has a low center of gravity. therefor, it is IMPOSSIBLE to tip over.
So in stance, in addition to getting the structure aligned, we're also relaxing to "sink the chi" so that we find balance - Balance, relax, and structure are all interwoven in this definition - and that's the key to the Wujifa Triangles.