Impossible
Ryu sat in Isemeine's backyard. It was impossible to read much of anything from his face and he looked to have practically fused into one with the world. Every so often, dense lines of Heavenly Patterns would dance in the air around him before vanishing.
Ryu found comprehending and using Heavenly Patterns to be exceptionally easy, almost too much so. In fact, he did so, so quickly that he didn't even have a true concept of what was a lot and what was too few. It was difficult to separate out his progress in comparison to the rest of his cultivation.
But, he did know two things.
The first was number. The more Heavenly Patterns he had, the more powerful he became.