The mastering of something presupposes the understanding of that thing, which presupposes the hiding of other things from view.
Mastering something is to seize upon it and command it in accordance with one's nature, and what is within one's mind.
And to seize on something and command it is to alter it from its original trajectory, an alteration which spreads among what it is connected to.
All of this occurs in the background, whereas the object of mastery resides in the foreground, and the greater one focuses on this object, the more the background recedes.
