Lecture XVII
Through abstract thinking one makes a copy of something that exists. Through Imagination a man allows himself to be fructified by the formative spirit within him. Imagination corresponds to hidden realities which have arisen through the fructifying impulse of higher beings; thus one can see these higher spiritual beings on the Astral Plane. The prerequisite for this is to develop a speech that is not the expression of abstract thoughts, but of pictures. This is why mediums also speak in imaginations, in pictures and symbols, but unconsciously. Behind them the spirit is forming the symbols. The occult pupil does this in full consciousness, nevertheless in a way that is not arbitrary. In so doing he allows himself to be fructified by the spirit.