Kabbalah is called “the science of the hidden” because it reveals to the one who learns it that which was previously hidden. The true picture of existence is revealed only to the one who apprehends it, as is written in the poem by Rabbi Ashlag...
The lowest level on the scale of the spiritual resembles the inanimate part of nature, similar to bodies in space, or minerals, and so on. This inanimate level is also called "not alive"...