The worlds represent increasing phases of densification, the involuting descent of spirit into matter, where the way becomes harder and longer.
Rudolf SteinerHe who perceives in the spiritual world must know that at times Imaginations are assigned to him which at first he must forego understanding; he must receive them as Imaginations and let them ripen in his soul as such. In spiritual experience, much depends on a man having the patience to make observations, at first to simply accept them, and to wait with understanding them until the right moment arrives.
Rudolf SteinerJust as in the body, eye and ear develop as organs of perception, as senses for bodily processes, so does a man develop in himself soul and spiritual organs of perception through which the soul and spiritual worlds are opened to him. For those who do not have such higher senses, these worlds are dark and silent, just as the bodily world is dark and silent for a being without eyes and ears.
Rudolf SteinerA real medicine can only exist when it penetrates into a knowledge which embraces the human being in respect to body, soul and spirit.
Rudolf Steiner