How the Spiritual World Interpenetrates the Physical

Human life changes with respect to many things, but certain fundamental facts of life remain constant for long periods. In the Middle Ages there existed a certain fear, the so-called fear of spirits, of all sorts of elemental beings and ghosts; this we now call mediaeval superstition. In our day the object has changed, but not the fear; for just as the people of the Middle Ages were afraid of ghosts-—those of the present time are afraid of bacilli and similar things. It might be said that ghosts are more respectable and more to be feared than bacilli. The change has come about through the fact that formerly people were of a more spiritual disposition; they were afraid of the elemental spirit-beings; while now as the disposition is more materialistic, the spirits must be of a physical nature. This corresponds better with the age of materialism. What I wanted to say, however, is that Occult Science reveals the fact that bacilli are nourished in the human body if they are to thrive. Human beings do cultivate them. Of course everyone in the present time will say that it would be silly to breed bacilli. This is not a question of principle of any kind, but of looking at things from the right standpoint. It cannot be denied that, as Spiritual Science teaches, an Ego and astral body which have been fed on materialistic ideas alone, and have rejected all spiritual conceptions and wished to have nothing to do with them, when they leave the body during sleep, send into the bodily organs forces from the spiritual spheres which are just what the bacilli need. Nothing better can be done for the rearing of bacilli than to carry crude material ideas into sleep-life; thereby calling forth Ahrimanic forces which stream into the body and become the cultivators of bacilli.