Those who wish to know which path to follow in order to reach the spiritual world will find great illumination in the sephirotic tree

"Those who wish to know which path to follow in order to reach the spiritual world will find great illumination in the sephirotic tree, for the sephirotic tree, which is a representation of the different regions of the universe, also represents the various psychic realms in a human being.

Starting at the bottom, the first sephirah is Malkuth, which represents the physical plane, the earth. On leaving Malkuth, you leave the physical plane and enter the psychic plane, Yesod, the region of the moon. Yesod is the beginning of psychic life and thus represents a progression when compared with Malkuth. But the psychic life is made up at first of misty regions, of vague, indeterminate forms in which you can become lost. This is the lower part of Yesod, which has not yet been visited by the light of Tiphareth, the sun. You should not delay in this area but go beyond it, until you discover the world of light, the world of the spirit, because that is where true spiritual life and true work begin."