‘In the case of a solar eclipse, the evil that has spread over the earth can be carried out into the cosmos to wreak more havoc there, whereas in the case of a lunar eclipse, people who absolutely want to be possessed by evil thoughts can receive them from the cosmos.’ In the first full translation of this lecture course, Rudolf Steiner implores his audience to recognize the connections between the material and spiritual worlds. Eclipses of the sun and moon, for example, are ‘forces at work in the universe, just like those we study today in the clinic or in the chemistry or physics laboratory’. Even everyday thinking can have a strong impact on the outer world. Materialistic thought, he says, can quite literally atomize our surroundings: ‘if all human beings start to think that everything has to be explained in terms of atoms… then the earth will actually turn into atoms… these false ideas create false realities…’ Steiner speaks of the ‘world of will’ as being three-dimensional, the