(Quote) Gareth Knight - A Practical Guide to Qabalistic Symbolism, Volume II

"...it is the refusal to comedown to Earth, literally, that is the cause of the bulk of spiritual pathology - the root of sin, disease, ignorance. It is the real blasphemy, a rejection of the work of the Father in Heaven, a rejection of the Universe. (The Universe, let it he noted, is the Tarot Trump of this Path.) Until physical existence in the Universe is willingly accepted by the Spirit the Initiation of the Nadir cannot take place. Malkuth is the Gate, the door to evolution and the work of destiny. Evolution cannot take place until Involution is complete."