Zen Satsui is a Balance of Contrasting Energies

Controlled Aggression

Steady Precision

Exertion without Animosity

The Zen Satsui symbol is simply a Z interconnected with an S 
It imitates the nature of the contrasting energies Zen Satsui balances
The two letters share a similar pattern, facing opposite sides
One drawn with straight rigid lines, the other soft and curved

The symbol can be repeated indefinitely into relative abstraction, following an alternating, meditative flow 
between "straights" and "squiggles"