"Thou knowest that in the end, when Nirvâna is attained, the soul shall gather up all that it hath left within the astral of holy memories and worthy experience, and to this end the Ruach rises in the astral sphere, by the gradual decay and loss of its more material affinities, until these have so disintegrated and perished that its substance is thereby lightened and purified. But continual commerce and intercourse with earth add, as it were, fresh fuel to its earthly affinities, keeping these alive, and hindering its recall to its spiritual ego. Thus, therefore, the spiritual ego itself is detained from perfect absorption into the divine, and union therewith. For the Ruach shall not all die, if there be in it anything worthy of recall. The astral sphere is its purging chamber. For Saturn, who is Time, is the trier of all things; he devoureth all the dross; only that escapeth which in its nature is ethereal and destined to reign. And this death of the Ruach is gradual and natural. It is a process of elimination and disintegration, often--as men measure time--extending over many decades, or even centuries. And those Ruachs which appertain to wicked and evil persons, having strong wills inclined earthwards,--these persist longest and manifest most frequently and vividly, because they _rise not_, but, being destined to perish utterly, are not withdrawn from immediate contact with the earth. They are all dross; there is in them no redeemable element. But the Ruach of the righteous complaineth if thou disturb his evolution. 'Why callest thou me? disturb me not. The memories of my earth-life are chains about my neck; the desire of the past detaineth me. Suffer me to rise towards my rest, and hinder me not with evocations. But let thy love go after me and encompass me; so shalt thou rise with me through sphere after sphere.'