This theory helps to reveal the mystery that lies in the connection between the living and the dead. The idea of obsession may be thus explained, that a reflection of the thought of someone on the other side, held fast by a living creature on the earth, becomes an obsession. Very often it may happen that when a young anarchist has assassinated someone, in the end one finds that there was no great enmity between him and the person whom he killed. The mystery behind it is that some enemy of the person who was killed, on the other side, reflected his thought in the passive mind of this young man, who through his enthusiasm and strength felt inclined to kill someone, himself not knowing the reason. One finds such cases among anarchists especially. Owing to their extreme points of view their heart is in a condition to be receptive; they can receive a good reflection or a bad reflection, and act accordingly.