Just 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 SteinerWhen the human being hears music, he has a sense of wellbeing, because these tones harmonize with what he has experienced in the world of his spiritual home.
Rudolf SteinerThinking... is no more and no less an organ of perception than the eye or ear. Just as the eye perceives colours and the ear sounds, so thinking perceives ideas
Rudolf SteinerWe have seen that blood united to blood in the case of but remotely connected species of animals, kills; blood united to blood in the case of more closely allied species of animals does not kill. The physical organism of man survives when strange blood comes in contact with strange blood, ... but clairvoyant power perishes under the influence of this mixing of blood, or exogamy.
Rudolf Steiner