Noah condensed part of his mental energy in the form of thick layers that would act as a filter to isolate the will of Heaven and Earth from the "Breath". Then, he activated the first part of the training method.
His mental energy spread in the environment and attached itself to the "Breath" that it touched, only to be pulled back toward his mind when he retracted it.
Human cultivators would have to use most of their mental energy just to drag a small amount of that "Breath". Instead, Noah could gather all the energy contained in the room since his consciousness was powerful enough.
The layers of mental energy exited his mental sphere and surrounded its walls to create a filter for the incoming "Breath".
Of course, he had built those layers in the specific way described in the method, and only after his analysis had led to the conclusion that those structures were harmless.
