The spiral is inherent in flow, think of an exhale, it is all planar turbulent vortices, what are vortices? It is a balance of forces, high pressure swirls in a spiral to fill low pressure, the spiral flow creates the low pressure while high pressure surrounding the swirling low pressure flow creates the definition, the wall of the vortex. The centrifugal motion of the air drives it outward lowering the pressure of the core, while the surrounding high pressure air resists that outward force.
Still air is high pressure air, flowing air is low pressure air, the still high pressure air moves to the flowing low to fill it in a spiral.
The void is filled by a spiral.
What is a spiral but a recursive circle?
The motion of the piston is translated into circular motion, the twist is a spiral twist or engines would not need THRUST bearings.
Gears are most efficent and quiet when they are beveled and spiral cut.
Which air has the highest pressure, is not the deepest water the stillest water? At sea level we are surrounded and filled by air pressing down on us from all angles at 14.7 pounds per square inch. The weight of the entire atmosphere rushes to fill every pore and cavity of your body. It does this by standing still. It is only when you flow that air escapes, you have to force the air out, it keeps filling you without doing anything but being. All the motion that we experience without moving is more than we can comprehend, yet we don't see it, every force balances out to stillness, every hurricane and rain shower all balance to stillness.
Flow and stillness are the same, they lead to each other, once found the duality and how they nourish each other, the process can commence. So sayeth reality, we compare, and contrast, pay attention to what is important, neglect what we fear.
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