It is equally clear how the violation of certain taboo prohibitions becomes a social danger which must be punished or expiated by all the members of society lest it harm them all. This danger really exists if we substitute the known impulses for the unconscious desires. It consists in the possibility of imitation, as a result of which society would soon be dissolved. If the others did not punish the violation they would perforce become aware that they want to imitate the evil doer. Though the secret meaning of a taboo prohibition cannot possibly be of so special a nature as in the case of a neurosis, we must not be astonished to find that touching plays a similar rôle in taboo prohibition as in the _délire de toucher_. To touch is the beginning of every act of possession, of every attempt to make use of a person or thing. We have interpreted the power of contagion which inheres in the taboo as the property of leading into temptation, and of inciting to imitation. This does not seem to be in accord with the fact that the contagiousness of the taboo is above all manifested in the transference to objects which thus themselves become carriers of the taboo. This transferability of the taboo reflects what is found in the neurosis, namely, the constant tendency of the unconscious impulse to become displaced through associative channels upon new objects. Our attention is thus drawn to the fact that the dangerous magic power of the ‘mana’ corresponds to two real faculties, the capacity of reminding man of his forbidden wishes, and the apparently more important one of tempting him to violate the prohibition in the service of these wishes. Both functions reunite into one, however, if we assume it to be in accord with a primitive psychic life that with the awakening of a memory of a forbidden action there should also be combined the awakening of the tendency to carry out the action. Memory and temptation then again coincide. We must also admit that if the example of a person who has violated a prohibition leads another to the same action, the disobedience of the prohibition has been transmitted like a contagion, just as the taboo is transferred from a person to an object, and from this to another. If the violation of a taboo can be condoned through expiation or penance, which means, of course, a _renunciation_ of a possession or a liberty, we have the proof that the observance of a taboo regulation was itself a renunciation of something really wished for. The omission of one renunciation is cancelled through a renunciation at some other point. This would lead us to conclude that, as far as taboo ceremonials are concerned, penance is more primitive than purification.