Anything visible, and anything that can be grasped by thought, is bounded.
Anything bounded is finite. Anything finite is not undifferentiated. The boundless is called Ein Sof, Infinite. It is absolute undifferentiation in perfect, changeless oneness.
Since it is boundless, there is nothing outside of it. Since it transcends and conceals itself, it is the essence of everything hidden and concealed.
Since it is concealed, it is the root of faith and the root of rebellion.
As it is written, "One who is righteous lives by his faith." We comprehend it only by way of no.
"Since I am Infinite Space, and the Infinite Stars thereof, do ye also thus. Bind nothing! Let there be no difference made among you between any one thing & any other thing; for thereby there cometh hurt." ~ Liber AL vel Legis (The Book of the Law) I:22